157270644 has 18 divisors (see below), whose sum is σ = 397545330. Its totient is φ = 52423536.

The previous prime is 157270639. The next prime is 157270661. The reversal of 157270644 is 446072751.

157270644 is a `hidden beast` number, since 1 + 5 + 7 + 2 + 7 + 0 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 157251600 + 19044 = 12540^2 + 138^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4368629 = 157270644 / (1 + 5 + 7 + 2 + 7 + 0 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 157270599 and 157270608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2184279 + ... + 2184350.

Almost surely, 2^157270644 is an apocalyptic number.

It is an amenable number.

157270644 is an abundant number, since it is smaller than the sum of its proper divisors (240274686).

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

157270644 is a wasteful number, since it uses less digits than its factorization.

157270644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368639 (or 4368634 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 157270644 is about 12540.7593071552. The cubic root of 157270644 is about 539.7788806618.

The spelling of 157270644 in words is "one hundred fifty-seven million, two hundred seventy thousand, six hundred forty-four".