23266640 has 40 divisors (see below), whose sum is σ = 56945760. Its totient is φ = 8816256.

The previous prime is 23266637. The next prime is 23266657. The reversal of 23266640 is 4666232.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6134 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (1423644).

Almost surely, 2^23266640 is an apocalyptic number.

23266640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23266640 is an abundant number, since it is smaller than the sum of its proper divisors (33679120).

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

23266640 is a wasteful number, since it uses less digits than its factorization.

23266640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15339 (or 15333 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 23266640 is about 4823.5505594945. The cubic root of 23266640 is about 285.4814474466.

The spelling of 23266640 in words is "twenty-three million, two hundred sixty-six thousand, six hundred forty".