128572830 has 24 divisors (see below), whose sum is σ = 334289592. Its totient is φ = 34286064.

The previous prime is 128572813. The next prime is 128572849. The reversal of 128572830 is 38275821.

128572830 is a `hidden beast` number, since 1 + 2 + 8 + 572 + 83 + 0 = 666.

It is a super-2 number, since 2×128572830² = 33061945228417800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714204 + ... + 714383.

It is an arithmetic number, because the mean of its divisors is an integer number (13928733).

Almost surely, 2^128572830 is an apocalyptic number.

128572830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128572830 is an abundant number, since it is smaller than the sum of its proper divisors (205716762).

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

128572830 is a wasteful number, since it uses less digits than its factorization.

128572830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428600 (or 1428597 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 128572830 is about 11338.9959872998. The cubic root of 128572830 is about 504.7190935214.

The spelling of 128572830 in words is "one hundred twenty-eight million, five hundred seventy-two thousand, eight hundred thirty".