155396988 has 48 divisors (see below), whose sum is σ = 404256160. Its totient is φ = 51622272.

The previous prime is 155396959. The next prime is 155397013. The reversal of 155396988 is 889693551.

It is a happy number.

155396988 is a `hidden beast` number, since 1 + 553 + 9 + 6 + 9 + 88 = 666.

155396988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31506 + ... + 36102.

Almost surely, 2^155396988 is an apocalyptic number.

155396988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

155396988 is an abundant number, since it is smaller than the sum of its proper divisors (248859172).

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

155396988 is a wasteful number, since it uses less digits than its factorization.

155396988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923 (or 4915 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 155396988 is about 12465.8328241638. The cubic root of 155396988 is about 537.6267455205.

The spelling of 155396988 in words is "one hundred fifty-five million, three hundred ninety-six thousand, nine hundred eighty-eight".