23422640 has 40 divisors (see below), whose sum is σ = 54960768. Its totient is φ = 9282560.

The previous prime is 23422627. The next prime is 23422657. The reversal of 23422640 is 4622432.

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

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, 7745 + ... + 10335.

Almost surely, 2^23422640 is an apocalyptic number.

23422640 is a gapful number since it is divisible by the number (20) 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 23422640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27480384).

23422640 is an abundant number, since it is smaller than the sum of its proper divisors (31538128).

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

23422640 is a wasteful number, since it uses less digits than its factorization.

23422640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 23422640 is about 4839.6942052159. The cubic root of 23422640 is about 286.1180662386.

The spelling of 23422640 in words is "twenty-three million, four hundred twenty-two thousand, six hundred forty".