155890032 has 40 divisors (see below), whose sum is σ = 404314896. Its totient is φ = 51757056.

The previous prime is 155890027. The next prime is 155890043. The reversal of 155890032 is 230098551.

It is a super-2 number, since 2×155890032² = 48603404153922048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155889975 and 155890002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6018 + ... + 18654.

Almost surely, 2^155890032 is an apocalyptic number.

155890032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155890032 is an abundant number, since it is smaller than the sum of its proper divisors (248424864).

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

155890032 is a wasteful number, since it uses less digits than its factorization.

155890032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12905 (or 12899 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 155890032 is about 12485.5929775081. The cubic root of 155890032 is about 538.1947397815.

The spelling of 155890032 in words is "one hundred fifty-five million, eight hundred ninety thousand, thirty-two".