155283920 has 40 divisors (see below), whose sum is σ = 393858720. Its totient is φ = 56466560.

The previous prime is 155283917. The next prime is 155283943. The reversal of 155283920 is 29382551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×155283920² = 48226191621132800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87350 + ... + 89109.

It is an arithmetic number, because the mean of its divisors is an integer number (9846468).

Almost surely, 2^155283920 is an apocalyptic number.

155283920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155283920 is an abundant number, since it is smaller than the sum of its proper divisors (238574800).

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

155283920 is a wasteful number, since it uses less digits than its factorization.

155283920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176483 (or 176477 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 155283920 is about 12461.2968827486. The cubic root of 155283920 is about 537.4963201479.

The spelling of 155283920 in words is "one hundred fifty-five million, two hundred eighty-three thousand, nine hundred twenty".