23139660 has 24 divisors (see below), whose sum is σ = 64791216. Its totient is φ = 6170560.

The previous prime is 23139659. The next prime is 23139661. The reversal of 23139660 is 6693132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23139659) and next prime (23139661).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (23139661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192771 + ... + 192890.

It is an arithmetic number, because the mean of its divisors is an integer number (2699634).

Almost surely, 2^23139660 is an apocalyptic number.

23139660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23139660 is an abundant number, since it is smaller than the sum of its proper divisors (41651556).

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

23139660 is a wasteful number, since it uses less digits than its factorization.

23139660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385673 (or 385671 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 23139660 is about 4810.3700481356. The cubic root of 23139660 is about 284.9611519841.

The spelling of 23139660 in words is "twenty-three million, one hundred thirty-nine thousand, six hundred sixty".