155320788 has 72 divisors (see below), whose sum is σ = 435235584. Its totient is φ = 42940800.

The previous prime is 155320747. The next prime is 155320799. The reversal of 155320788 is 887023551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13968 + ... + 22488.

Almost surely, 2^155320788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155320788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217617792).

155320788 is an abundant number, since it is smaller than the sum of its proper divisors (279914796).

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

155320788 is a wasteful number, since it uses less digits than its factorization.

155320788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573 (or 8564 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 155320788 is about 12462.7760952366. The cubic root of 155320788 is about 537.5388548079.

The spelling of 155320788 in words is "one hundred fifty-five million, three hundred twenty thousand, seven hundred eighty-eight".