157297128 has 32 divisors (see below), whose sum is σ = 394303200. Its totient is φ = 52291008.

The previous prime is 157297121. The next prime is 157297159. The reversal of 157297128 is 821792751.

It is a self number, because there is not a number n which added to its sum of digits gives 157297128.

It is not an unprimeable number, because it can be changed into a prime (157297121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450 + ... + 17742.

It is an arithmetic number, because the mean of its divisors is an integer number (12321975).

Almost surely, 2^157297128 is an apocalyptic number.

It is an amenable number.

157297128 is an abundant number, since it is smaller than the sum of its proper divisors (237006072).

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

157297128 is a wasteful number, since it uses less digits than its factorization.

157297128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681 (or 17677 counting only the distinct ones).

The product of its digits is 70560, while the sum is 42.

The square root of 157297128 is about 12541.8151796301. The cubic root of 157297128 is about 539.8091781183.

The spelling of 157297128 in words is "one hundred fifty-seven million, two hundred ninety-seven thousand, one hundred twenty-eight".