23515390 has 16 divisors (see below), whose sum is σ = 42725232. Its totient is φ = 9317824.

The previous prime is 23515379. The next prime is 23515397. The reversal of 23515390 is 9351532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23515397) 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, 9919 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (2670327).

Almost surely, 2^23515390 is an apocalyptic number.

23515390 is a deficient number, since it is larger than the sum of its proper divisors (19209842).

23515390 is a wasteful number, since it uses less digits than its factorization.

23515390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22091.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 23515390 is about 4849.2669549118. The cubic root of 23515390 is about 286.4952298069.

It can be divided in two parts, 235 and 15390, that added together give a 6-th power (15625 = 5⁶).

The spelling of 23515390 in words is "twenty-three million, five hundred fifteen thousand, three hundred ninety".