157620780 has 72 divisors (see below), whose sum is σ = 483537600. Its totient is φ = 41555712.

The previous prime is 157620761. The next prime is 157620791. The reversal of 157620780 is 87026751.

157620780 is a `hidden beast` number, since 1 + 576 + 2 + 0 + 7 + 80 = 666.

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

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, 11101 + ... + 20939.

It is an arithmetic number, because the mean of its divisors is an integer number (6715800).

Almost surely, 2^157620780 is an apocalyptic number.

157620780 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 157620780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241768800).

157620780 is an abundant number, since it is smaller than the sum of its proper divisors (325916820).

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

157620780 is a wasteful number, since it uses less digits than its factorization.

157620780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 157620780 is about 12554.7114662186. The cubic root of 157620780 is about 540.1791586600.

The spelling of 157620780 in words is "one hundred fifty-seven million, six hundred twenty thousand, seven hundred eighty".