23128580 has 12 divisors (see below), whose sum is σ = 48570060. Its totient is φ = 9251424.

The previous prime is 23128561. The next prime is 23128597. The reversal of 23128580 is 8582132.

It can be written as a sum of positive squares in 2 ways, for example, as 6220036 + 16908544 = 2494^2 + 4112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578195 + ... + 578234.

It is an arithmetic number, because the mean of its divisors is an integer number (4047505).

Almost surely, 2^23128580 is an apocalyptic number.

23128580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23128580 is an abundant number, since it is smaller than the sum of its proper divisors (25441480).

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

23128580 is a wasteful number, since it uses less digits than its factorization.

23128580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156438 (or 1156436 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 23128580 is about 4809.2182316880. The cubic root of 23128580 is about 284.9156619229.

The spelling of 23128580 in words is "twenty-three million, one hundred twenty-eight thousand, five hundred eighty".