23139460 has 24 divisors (see below), whose sum is σ = 48686400. Its totient is φ = 9237984.

The previous prime is 23139443. The next prime is 23139481. The reversal of 23139460 is 6493132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15841 + ... + 17239.

It is an arithmetic number, because the mean of its divisors is an integer number (2028600).

Almost surely, 2^23139460 is an apocalyptic number.

23139460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23139460 is an abundant number, since it is smaller than the sum of its proper divisors (25546940).

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

23139460 is a wasteful number, since it uses less digits than its factorization.

23139460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23139460 is about 4810.3492596692. The cubic root of 23139460 is about 284.9603309925.

The spelling of 23139460 in words is "twenty-three million, one hundred thirty-nine thousand, four hundred sixty".