128570031 has 24 divisors (see below), whose sum is σ = 202349840. Its totient is φ = 80666496.

The previous prime is 128570011. The next prime is 128570041. The reversal of 128570031 is 130075821.

It is not a de Polignac number, because 128570031 - 2²⁶ = 61461167 is a prime.

It is a super-2 number, since 2×128570031² = 33060505742681922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128569977 and 128570004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128570011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436 + ... + 16041.

Almost surely, 2^128570031 is an apocalyptic number.

128570031 is a deficient number, since it is larger than the sum of its proper divisors (73779809).

128570031 is a wasteful number, since it uses less digits than its factorization.

128570031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520 (or 16497 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 128570031 is about 11338.8725630020. The cubic root of 128570031 is about 504.7154309565.

The spelling of 128570031 in words is "one hundred twenty-eight million, five hundred seventy thousand, thirty-one".