23015904 has 48 divisors (see below), whose sum is σ = 60773328. Its totient is φ = 7626752.

The previous prime is 23015899. The next prime is 23015917. The reversal of 23015904 is 40951032.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18304 + ... + 19520.

It is an arithmetic number, because the mean of its divisors is an integer number (1266111).

Almost surely, 2^23015904 is an apocalyptic number.

23015904 is a gapful number since it is divisible by the number (24) 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 23015904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30386664).

23015904 is an abundant number, since it is smaller than the sum of its proper divisors (37757424).

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

23015904 is a wasteful number, since it uses less digits than its factorization.

23015904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1419 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 23015904 is about 4797.4893433962. The cubic root of 23015904 is about 284.4522319555.

Adding to 23015904 its reverse (40951032), we get a palindrome (63966936).

The spelling of 23015904 in words is "twenty-three million, fifteen thousand, nine hundred four".