23415720 has 32 divisors (see below), whose sum is σ = 70247520. Its totient is φ = 6244160.

The previous prime is 23415713. The next prime is 23415727. The reversal of 23415720 is 2751432.

It is an interprime number because it is at equal distance from previous prime (23415713) and next prime (23415727).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (23415727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97446 + ... + 97685.

It is an arithmetic number, because the mean of its divisors is an integer number (2195235).

Almost surely, 2^23415720 is an apocalyptic number.

23415720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23415720 is an abundant number, since it is smaller than the sum of its proper divisors (46831800).

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

23415720 is a wasteful number, since it uses less digits than its factorization.

23415720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195145 (or 195141 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 23415720 is about 4838.9792312016. The cubic root of 23415720 is about 286.0898864940.

The spelling of 23415720 in words is "twenty-three million, four hundred fifteen thousand, seven hundred twenty".