23965520 has 20 divisors (see below), whose sum is σ = 55720020. Its totient is φ = 9586176.

The previous prime is 23965483. The next prime is 23965531. The reversal of 23965520 is 2556932.

It can be written as a sum of positive squares in 2 ways, for example, as 7772944 + 16192576 = 2788^2 + 4024^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×23965520² = 1148692297740800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149705 + ... + 149864.

It is an arithmetic number, because the mean of its divisors is an integer number (2786001).

Almost surely, 2^23965520 is an apocalyptic number.

23965520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23965520 is an abundant number, since it is smaller than the sum of its proper divisors (31754500).

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

23965520 is a wasteful number, since it uses less digits than its factorization.

23965520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299582 (or 299576 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 23965520 is about 4895.4591204503. The cubic root of 23965520 is about 288.3117123983.

The spelling of 23965520 in words is "twenty-three million, nine hundred sixty-five thousand, five hundred twenty".