72665400 has 96 divisors (see below), whose sum is σ = 226949760. Its totient is φ = 19232640.

The previous prime is 72665393. The next prime is 72665401. The reversal of 72665400 is 456627.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72665401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97429 + ... + 98171.

It is an arithmetic number, because the mean of its divisors is an integer number (2364060).

Almost surely, 2^72665400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72665400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113474880).

72665400 is an abundant number, since it is smaller than the sum of its proper divisors (154284360).

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

72665400 is a wasteful number, since it uses less digits than its factorization.

72665400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 72665400 is about 8524.4002721599. The cubic root of 72665400 is about 417.2943995862.

The spelling of 72665400 in words is "seventy-two million, six hundred sixty-five thousand, four hundred".