157285730 has 64 divisors (see below), whose sum is σ = 339959808. Its totient is φ = 51226560.

The previous prime is 157285729. The next prime is 157285771. The reversal of 157285730 is 37582751.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339479 + ... + 339941.

It is an arithmetic number, because the mean of its divisors is an integer number (5311872).

Almost surely, 2^157285730 is an apocalyptic number.

157285730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157285730 is an abundant number, since it is smaller than the sum of its proper divisors (182674078).

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

157285730 is a wasteful number, since it uses less digits than its factorization.

157285730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 157285730 is about 12541.3607714634. The cubic root of 157285730 is about 539.7961393263.

The spelling of 157285730 in words is "one hundred fifty-seven million, two hundred eighty-five thousand, seven hundred thirty".