23701640 has 32 divisors (see below), whose sum is σ = 54065880. Its totient is φ = 9349632.

The previous prime is 23701633. The next prime is 23701669. The reversal of 23701640 is 4610732.

It can be written as a sum of positive squares in 4 ways, for example, as 22829284 + 872356 = 4778^2 + 934^2 .

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, 1139 + ... + 6978.

Almost surely, 2^23701640 is an apocalyptic number.

23701640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23701640 is an abundant number, since it is smaller than the sum of its proper divisors (30364240).

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

23701640 is a wasteful number, since it uses less digits than its factorization.

23701640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201 (or 8197 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 23701640 is about 4868.4330127876. The cubic root of 23701640 is about 287.2496219636.

The spelling of 23701640 in words is "twenty-three million, seven hundred one thousand, six hundred forty".