157878720 has 140 divisors (see below), whose sum is σ = 561694584. Its totient is φ = 42094080.

The previous prime is 157878719. The next prime is 157878731. The reversal of 157878720 is 27878751.

157878720 is a `hidden beast` number, since 1 + 578 + 7 + 8 + 72 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22875 + ... + 28965.

Almost surely, 2^157878720 is an apocalyptic number.

157878720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157878720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280847292).

157878720 is an abundant number, since it is smaller than the sum of its proper divisors (403815864).

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

157878720 is an equidigital number, since it uses as much as digits as its factorization.

157878720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 45.

The square root of 157878720 is about 12564.9799044805. The cubic root of 157878720 is about 540.4736584853.

The spelling of 157878720 in words is "one hundred fifty-seven million, eight hundred seventy-eight thousand, seven hundred twenty".