23772720 has 40 divisors (see below), whose sum is σ = 73696176. Its totient is φ = 6339328.

The previous prime is 23772703. The next prime is 23772733. The reversal of 23772720 is 2727732.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49287 + ... + 49766.

Almost surely, 2^23772720 is an apocalyptic number.

23772720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23772720 is an abundant number, since it is smaller than the sum of its proper divisors (49923456).

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

23772720 is a wasteful number, since it uses less digits than its factorization.

23772720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99069 (or 99063 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 23772720 is about 4875.7276380044. The cubic root of 23772720 is about 287.5364843428.

The spelling of 23772720 in words is "twenty-three million, seven hundred seventy-two thousand, seven hundred twenty".