23400072 has 24 divisors (see below), whose sum is σ = 63375390. Its totient is φ = 7800000.

The previous prime is 23400067. The next prime is 23400089. The reversal of 23400072 is 27000432.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 8608356 = 3846^2 + 2934^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162429 + ... + 162572.

Almost surely, 2^23400072 is an apocalyptic number.

It is an amenable number.

23400072 is an abundant number, since it is smaller than the sum of its proper divisors (39975318).

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

23400072 is a wasteful number, since it uses less digits than its factorization.

23400072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325013 (or 325006 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 23400072 is about 4837.3620910575. The cubic root of 23400072 is about 286.0261439579.

The spelling of 23400072 in words is "twenty-three million, four hundred thousand, seventy-two".