128157320 has 16 divisors (see below), whose sum is σ = 288354060. Its totient is φ = 51262912.

The previous prime is 128157319. The next prime is 128157347. The reversal of 128157320 is 23751821.

It can be written as a sum of positive squares in 2 ways, for example, as 126472516 + 1684804 = 11246^2 + 1298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601927 + ... + 1602006.

Almost surely, 2^128157320 is an apocalyptic number.

128157320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128157320 is an abundant number, since it is smaller than the sum of its proper divisors (160196740).

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

128157320 is a wasteful number, since it uses less digits than its factorization.

128157320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203944 (or 3203940 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128157320 is about 11320.6589914192. The cubic root of 128157320 is about 504.1748049897.

The spelling of 128157320 in words is "one hundred twenty-eight million, one hundred fifty-seven thousand, three hundred twenty".