23859864 has 72 divisors (see below), whose sum is σ = 75181860. Its totient is φ = 6816096.

The previous prime is 23859859. The next prime is 23859889. The reversal of 23859864 is 46895832.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×23859864² = 1138586220196992, which contains 22 as substring.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 147 + ... + 6909.

Almost surely, 2^23859864 is an apocalyptic number.

23859864 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 23859864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37590930).

23859864 is an abundant number, since it is smaller than the sum of its proper divisors (51321996).

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

23859864 is a wasteful number, since it uses less digits than its factorization.

23859864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789 (or 6775 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 23859864 is about 4884.6559756036. The cubic root of 23859864 is about 287.8873981104.

The spelling of 23859864 in words is "twenty-three million, eight hundred fifty-nine thousand, eight hundred sixty-four".