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1304043220 = 22565202161
BaseRepresentation
bin100110110111010…
…0001111011010100
310100212210021000001
41031232201323110
510132313340340
6333222101044
744213120164
oct11556417324
93325707001
101304043220
1160a109a77
1230487a784
1317a22240c
14c52945a4
157973d29a
hex4dba1ed4

1304043220 has 12 divisors (see below), whose sum is σ = 2738490804. Its totient is φ = 521617280.

The previous prime is 1304043211. The next prime is 1304043227. The reversal of 1304043220 is 223404031.

It can be written as a sum of positive squares in 2 ways, for example, as 416241604 + 887801616 = 20402^2 + 29796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304043227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32601061 + ... + 32601100.

It is an arithmetic number, because the mean of its divisors is an integer number (228207567).

Almost surely, 21304043220 is an apocalyptic number.

1304043220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304043220 is an abundant number, since it is smaller than the sum of its proper divisors (1434447584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1304043220 is a wasteful number, since it uses less digits than its factorization.

1304043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65202170 (or 65202168 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1304043220 is about 36111.5385991791. The cubic root of 1304043220 is about 1092.5231842483.

Adding to 1304043220 its reverse (223404031), we get a palindrome (1527447251).

The spelling of 1304043220 in words is "one billion, three hundred four million, forty-three thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 65202161 130404322 260808644 326010805 652021610 1304043220