157621320 has 48 divisors (see below), whose sum is σ = 512270460. Its totient is φ = 42032256.

The previous prime is 157621291. The next prime is 157621339. The reversal of 157621320 is 23126751.

It is a happy number.

157621320 is a `hidden beast` number, since 1 + 5 + 7 + 621 + 32 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 156800484 + 820836 = 12522^2 + 906^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218559 + ... + 219278.

Almost surely, 2^157621320 is an apocalyptic number.

157621320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157621320 is an abundant number, since it is smaller than the sum of its proper divisors (354649140).

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

157621320 is a wasteful number, since it uses less digits than its factorization.

157621320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437854 (or 437847 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 157621320 is about 12554.7329720707. The cubic root of 157621320 is about 540.1797755339.

The spelling of 157621320 in words is "one hundred fifty-seven million, six hundred twenty-one thousand, three hundred twenty".