72579388 has 36 divisors (see below), whose sum is σ = 148300320. Its totient is φ = 30989952.

The previous prime is 72579383. The next prime is 72579439. The reversal of 72579388 is 88397527.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72579383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71428 + ... + 72436.

Almost surely, 2^72579388 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 72579388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74150160).

72579388 is an abundant number, since it is smaller than the sum of its proper divisors (75720932).

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

72579388 is a wasteful number, since it uses less digits than its factorization.

72579388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1385 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 72579388 is about 8519.3537313578. The cubic root of 72579388 is about 417.1296880141.

The spelling of 72579388 in words is "seventy-two million, five hundred seventy-nine thousand, three hundred eighty-eight".