23139360 has 72 divisors (see below), whose sum is σ = 78967980. Its totient is φ = 6170112.

The previous prime is 23139307. The next prime is 23139367. The reversal of 23139360 is 6393132.

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 898704 = 4716^2 + 948^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (23139367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6595 + ... + 9474.

Almost surely, 2^23139360 is an apocalyptic number.

23139360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23139360 is an abundant number, since it is smaller than the sum of its proper divisors (55828620).

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

23139360 is a wasteful number, since it uses less digits than its factorization.

23139360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090 (or 16079 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 23139360 is about 4810.3388654023. The cubic root of 23139360 is about 284.9599204950.

The spelling of 23139360 in words is "twenty-three million, one hundred thirty-nine thousand, three hundred sixty".