157778460 has 72 divisors (see below), whose sum is σ = 546969696. Its totient is φ = 36063360.

The previous prime is 157778447. The next prime is 157778497. The reversal of 157778460 is 64877751.

157778460 is a `hidden beast` number, since 1 + 577 + 78 + 4 + 6 + 0 = 666.

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 23 ways as a sum of consecutive naturals, for example, 61351 + ... + 63870.

Almost surely, 2^157778460 is an apocalyptic number.

157778460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157778460 is an abundant number, since it is smaller than the sum of its proper divisors (389191236).

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

157778460 is a wasteful number, since it uses less digits than its factorization.

157778460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125243 (or 125238 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 157778460 is about 12560.9896106955. The cubic root of 157778460 is about 540.3592259985.

The spelling of 157778460 in words is "one hundred fifty-seven million, seven hundred seventy-eight thousand, four hundred sixty".