128390157 has 32 divisors (see below), whose sum is σ = 220646400. Its totient is φ = 72263664.

The previous prime is 128390149. The next prime is 128390161. The reversal of 128390157 is 751093821.

It is not a de Polignac number, because 128390157 - 2³ = 128390149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128390167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7594 + ... + 17732.

It is an arithmetic number, because the mean of its divisors is an integer number (6895200).

Almost surely, 2^128390157 is an apocalyptic number.

It is an amenable number.

128390157 is a deficient number, since it is larger than the sum of its proper divisors (92256243).

128390157 is a wasteful number, since it uses less digits than its factorization.

128390157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222 (or 10216 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 128390157 is about 11330.9380458989. The cubic root of 128390157 is about 504.4799495542.

The spelling of 128390157 in words is "one hundred twenty-eight million, three hundred ninety thousand, one hundred fifty-seven".