23139480 has 192 divisors, whose sum is σ = 86434560. Its totient is φ = 4852224.

The previous prime is 23139443. The next prime is 23139481. The reversal of 23139480 is 8493132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23139481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141879 + ... + 142041.

It is an arithmetic number, because the mean of its divisors is an integer number (450180).

Almost surely, 2^23139480 is an apocalyptic number.

23139480 is a gapful number since it is divisible by the number (20) 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 23139480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43217280).

23139480 is an abundant number, since it is smaller than the sum of its proper divisors (63295080).

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

23139480 is a wasteful number, since it uses less digits than its factorization.

23139480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 23139480 is about 4810.3513385199. The cubic root of 23139480 is about 284.9604130919.

The spelling of 23139480 in words is "twenty-three million, one hundred thirty-nine thousand, four hundred eighty".