23396640 has 96 divisors (see below), whose sum is σ = 74753280. Its totient is φ = 6150144.

The previous prime is 23396623. The next prime is 23396669. The reversal of 23396640 is 4669332.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37612 + ... + 38228.

It is an arithmetic number, because the mean of its divisors is an integer number (778680).

Almost surely, 2^23396640 is an apocalyptic number.

23396640 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 23396640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37376640).

23396640 is an abundant number, since it is smaller than the sum of its proper divisors (51356640).

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

23396640 is a wasteful number, since it uses less digits than its factorization.

23396640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 23396640 is about 4837.0073392543. The cubic root of 23396640 is about 286.0121598168.

The spelling of 23396640 in words is "twenty-three million, three hundred ninety-six thousand, six hundred forty".