23401720 has 16 divisors (see below), whose sum is σ = 52653960. Its totient is φ = 9360672.

The previous prime is 23401717. The next prime is 23401727. The reversal of 23401720 is 2710432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23401727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292482 + ... + 292561.

Almost surely, 2^23401720 is an apocalyptic number.

23401720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23401720 is an abundant number, since it is smaller than the sum of its proper divisors (29252240).

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

23401720 is a wasteful number, since it uses less digits than its factorization.

23401720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585054 (or 585050 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 23401720 is about 4837.5324288319. The cubic root of 23401720 is about 286.0328584674.

The spelling of 23401720 in words is "twenty-three million, four hundred one thousand, seven hundred twenty".