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103020880 = 2451287761
BaseRepresentation
bin1100010001111…
…11100101010000
321011212000002011
412020333211100
5202333132010
614120032304
72360443264
oct610774520
9234760064
10103020880
1153175126
122a602694
1318460801
14d97a0a4
15909ea8a
hex623f950

103020880 has 20 divisors (see below), whose sum is σ = 239523732. Its totient is φ = 41208320.

The previous prime is 103020859. The next prime is 103020881. The reversal of 103020880 is 88020301.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 88059456 = 3868^2 + 9384^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1030208802 = 21226603431948800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103020881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643801 + ... + 643960.

Almost surely, 2103020880 is an apocalyptic number.

103020880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103020880 is an abundant number, since it is smaller than the sum of its proper divisors (136502852).

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

103020880 is a wasteful number, since it uses less digits than its factorization.

103020880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287774 (or 1287768 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 103020880 is about 10149.9201967306. The cubic root of 103020880 is about 468.7864877079.

The spelling of 103020880 in words is "one hundred three million, twenty thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 1287761 2575522 5151044 6438805 10302088 12877610 20604176 25755220 51510440 103020880