157730820 has 48 divisors (see below), whose sum is σ = 475621440. Its totient is φ = 38825856.

The previous prime is 157730819. The next prime is 157730843. The reversal of 157730820 is 28037751.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100330 + ... + 101889.

It is an arithmetic number, because the mean of its divisors is an integer number (9908780).

Almost surely, 2^157730820 is an apocalyptic number.

157730820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157730820 is an abundant number, since it is smaller than the sum of its proper divisors (317890620).

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

157730820 is a wasteful number, since it uses less digits than its factorization.

157730820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202244 (or 202242 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 157730820 is about 12559.0931201262. The cubic root of 157730820 is about 540.3048347444.

The spelling of 157730820 in words is "one hundred fifty-seven million, seven hundred thirty thousand, eight hundred twenty".