23881865 has 24 divisors (see below), whose sum is σ = 33685632. Its totient is φ = 16205280.

The previous prime is 23881859. The next prime is 23881883. The reversal of 23881865 is 56818832.

It is not a de Polignac number, because 23881865 - 2⁴ = 23881849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25760 + ... + 26670.

It is an arithmetic number, because the mean of its divisors is an integer number (1403568).

Almost surely, 2^23881865 is an apocalyptic number.

It is an amenable number.

23881865 is a deficient number, since it is larger than the sum of its proper divisors (9803767).

23881865 is a wasteful number, since it uses less digits than its factorization.

23881865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1030 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 23881865 is about 4886.9075088444. The cubic root of 23881865 is about 287.9758571904.

It can be divided in two parts, 2388 and 1865, that multiplied together give a triangular number (4453620 = T₂₉₈₄).

The spelling of 23881865 in words is "twenty-three million, eight hundred eighty-one thousand, eight hundred sixty-five".