23897839 has 24 divisors (see below), whose sum is σ = 29565600. Its totient is φ = 19305216.

The previous prime is 23897837. The next prime is 23897857. The reversal of 23897839 is 93879832.

It is not a de Polignac number, because 23897839 - 2¹ = 23897837 is a prime.

It is a super-2 number, since 2×23897839² = 1142213417739842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

Its product of digits (653184) is a multiple of the sum of its prime factors (252).

It is a junction number, because it is equal to n+sod(n) for n = 23897792 and 23897801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23897831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123727 + ... + 123919.

It is an arithmetic number, because the mean of its divisors is an integer number (1231900).

Almost surely, 2^23897839 is an apocalyptic number.

23897839 is a deficient number, since it is larger than the sum of its proper divisors (5667761).

23897839 is an equidigital number, since it uses as much as digits as its factorization.

23897839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 219 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 23897839 is about 4888.5416025641. The cubic root of 23897839 is about 288.0400495680.

The spelling of 23897839 in words is "twenty-three million, eight hundred ninety-seven thousand, eight hundred thirty-nine".