128652831 has 12 divisors (see below), whose sum is σ = 185941080. Its totient is φ = 85718160.

The previous prime is 128652829. The next prime is 128652851. The reversal of 128652831 is 138256821.

It is a happy number.

128652831 is a `hidden beast` number, since 128 + 6 + 528 + 3 + 1 = 666.

It is not a de Polignac number, because 128652831 - 2¹ = 128652829 is a prime.

It is a super-2 number, since 2×128652831² = 33103101848629122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128652851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18325 + ... + 24353.

It is an arithmetic number, because the mean of its divisors is an integer number (15495090).

Almost surely, 2^128652831 is an apocalyptic number.

128652831 is a deficient number, since it is larger than the sum of its proper divisors (57288249).

128652831 is a wasteful number, since it uses less digits than its factorization.

128652831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406 (or 8403 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 128652831 is about 11342.5231320020. The cubic root of 128652831 is about 504.8237544630.

The spelling of 128652831 in words is "one hundred twenty-eight million, six hundred fifty-two thousand, eight hundred thirty-one".