157553388 has 18 divisors (see below), whose sum is σ = 398260044. Its totient is φ = 52517784.

The previous prime is 157553387. The next prime is 157553497. The reversal of 157553388 is 883355751.

157553388 is a `hidden beast` number, since 15 + 7 + 553 + 3 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (157553387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2188206 + ... + 2188277.

It is an arithmetic number, because the mean of its divisors is an integer number (22125558).

Almost surely, 2^157553388 is an apocalyptic number.

157553388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

157553388 is an abundant number, since it is smaller than the sum of its proper divisors (240706656).

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

157553388 is a wasteful number, since it uses less digits than its factorization.

157553388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376493 (or 4376488 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 157553388 is about 12552.0272466243. The cubic root of 157553388 is about 540.1021617409.

The spelling of 157553388 in words is "one hundred fifty-seven million, five hundred fifty-three thousand, three hundred eighty-eight".