23139072 has 162 divisors, whose sum is σ = 74215596. Its totient is φ = 6927360.

The previous prime is 23139043. The next prime is 23139119. The reversal of 23139072 is 27093132.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 278743 + ... + 278825.

Almost surely, 2^23139072 is an apocalyptic number.

23139072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23139072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37107798).

23139072 is an abundant number, since it is smaller than the sum of its proper divisors (51076524).

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

23139072 is a wasteful number, since it uses less digits than its factorization.

23139072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 23139072 is about 4810.3089297882. The cubic root of 23139072 is about 284.9587382555.

The spelling of 23139072 in words is "twenty-three million, one hundred thirty-nine thousand, seventy-two".