23989515 has 16 divisors (see below), whose sum is σ = 41872896. Its totient is φ = 11631200.

The previous prime is 23989513. The next prime is 23989517. The reversal of 23989515 is 51598932.

It is an interprime number because it is at equal distance from previous prime (23989513) and next prime (23989517).

It is not a de Polignac number, because 23989515 - 2¹ = 23989513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23989513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72531 + ... + 72860.

It is an arithmetic number, because the mean of its divisors is an integer number (2617056).

Almost surely, 2^23989515 is an apocalyptic number.

23989515 is a deficient number, since it is larger than the sum of its proper divisors (17883381).

23989515 is a wasteful number, since it uses less digits than its factorization.

23989515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145410.

The product of its digits is 97200, while the sum is 42.

The square root of 23989515 is about 4897.9092478322. The cubic root of 23989515 is about 288.4079024242.

The spelling of 23989515 in words is "twenty-three million, nine hundred eighty-nine thousand, five hundred fifteen".