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1220000032 = 25192006579
BaseRepresentation
bin100100010110111…
…1011100100100000
310011000122102102101
41020231323210200
54444310000112
6321020500144
742142554256
oct11055734440
93130572371
101220000032
11576727099
122a06aa654
131659a7914
14b80585d6
157218b757
hex48b7b920

1220000032 has 24 divisors (see below), whose sum is σ = 2528290800. Its totient is φ = 577894464.

The previous prime is 1220000027. The next prime is 1220000039. The reversal of 1220000032 is 2300000221.

It is a junction number, because it is equal to n+sod(n) for n = 1219999973 and 1220000018.

It is not an unprimeable number, because it can be changed into a prime (1220000039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002682 + ... + 1003897.

It is an arithmetic number, because the mean of its divisors is an integer number (105345450).

Almost surely, 21220000032 is an apocalyptic number.

It is an amenable number.

1220000032 is an abundant number, since it is smaller than the sum of its proper divisors (1308290768).

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

1220000032 is a wasteful number, since it uses less digits than its factorization.

1220000032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006608 (or 2006600 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1220000032 is about 34928.4988512246. The cubic root of 1220000032 is about 1068.5297394912.

Adding to 1220000032 its reverse (2300000221), we get a palindrome (3520000253).

The spelling of 1220000032 in words is "one billion, two hundred twenty million, thirty-two", and thus it is an aban number.

Divisors: 1 2 4 8 16 19 32 38 76 152 304 608 2006579 4013158 8026316 16052632 32105264 38125001 64210528 76250002 152500004 305000008 610000016 1220000032