157720372 has 12 divisors (see below), whose sum is σ = 277442116. Its totient is φ = 78451200.

The previous prime is 157720337. The next prime is 157720397. The reversal of 157720372 is 273027751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108243216 + 49477156 = 10404^2 + 7034^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101379 + ... + 102922.

Almost surely, 2^157720372 is an apocalyptic number.

It is an amenable number.

157720372 is a deficient number, since it is larger than the sum of its proper divisors (119721744).

157720372 is a wasteful number, since it uses less digits than its factorization.

157720372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204498 (or 204496 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 157720372 is about 12558.6771596375. The cubic root of 157720372 is about 540.2929046525.

The spelling of 157720372 in words is "one hundred fifty-seven million, seven hundred twenty thousand, three hundred seventy-two".