157248720 has 60 divisors (see below), whose sum is σ = 528096036. Its totient is φ = 41932800.

The previous prime is 157248719. The next prime is 157248743. The reversal of 157248720 is 27842751.

157248720 is a `hidden beast` number, since 1 + 572 + 4 + 87 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 45481536 + 111767184 = 6744^2 + 10572^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108481 + ... + 109920.

Almost surely, 2^157248720 is an apocalyptic number.

157248720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157248720 is an abundant number, since it is smaller than the sum of its proper divisors (370847316).

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

157248720 is a wasteful number, since it uses less digits than its factorization.

157248720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218420 (or 218411 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 157248720 is about 12539.8851669383. The cubic root of 157248720 is about 539.7537972306.

The spelling of 157248720 in words is "one hundred fifty-seven million, two hundred forty-eight thousand, seven hundred twenty".