128624823 has 12 divisors (see below), whose sum is σ = 185924440. Its totient is φ = 85688496.

The previous prime is 128624819. The next prime is 128624843. The reversal of 128624823 is 328426821.

128624823 is a `hidden beast` number, since 1 + 2 + 8 + 624 + 8 + 23 = 666.

It is not a de Polignac number, because 128624823 - 2² = 128624819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128624803) 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, 10740 + ... + 19302.

Almost surely, 2^128624823 is an apocalyptic number.

128624823 is a deficient number, since it is larger than the sum of its proper divisors (57299617).

128624823 is a wasteful number, since it uses less digits than its factorization.

128624823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10238 (or 10235 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 128624823 is about 11341.2884188702. The cubic root of 128624823 is about 504.7871180627.

The spelling of 128624823 in words is "one hundred twenty-eight million, six hundred twenty-four thousand, eight hundred twenty-three".