157980720 has 40 divisors (see below), whose sum is σ = 489740976. Its totient is φ = 42128128.

The previous prime is 157980689. The next prime is 157980733. The reversal of 157980720 is 27089751.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 328887 + ... + 329366.

Almost surely, 2^157980720 is an apocalyptic number.

157980720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157980720 is an abundant number, since it is smaller than the sum of its proper divisors (331760256).

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

157980720 is a wasteful number, since it uses less digits than its factorization.

157980720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658269 (or 658263 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 157980720 is about 12569.0381493573. The cubic root of 157980720 is about 540.5900272297.

The spelling of 157980720 in words is "one hundred fifty-seven million, nine hundred eighty thousand, seven hundred twenty".