155802920 has 128 divisors (see below), whose sum is σ = 450455040. Its totient is φ = 47139840.

The previous prime is 155802901. The next prime is 155802929. The reversal of 155802920 is 29208551.

It is not an unprimeable number, because it can be changed into a prime (155802929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82790 + ... + 84650.

It is an arithmetic number, because the mean of its divisors is an integer number (3519180).

Almost surely, 2^155802920 is an apocalyptic number.

155802920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155802920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225227520).

155802920 is an abundant number, since it is smaller than the sum of its proper divisors (294652120).

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

155802920 is a wasteful number, since it uses less digits than its factorization.

155802920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 155802920 is about 12482.1039893121. The cubic root of 155802920 is about 538.0944726143.

The spelling of 155802920 in words is "one hundred fifty-five million, eight hundred two thousand, nine hundred twenty".