72578384 has 10 divisors (see below), whose sum is σ = 140620650. Its totient is φ = 36289184.

The previous prime is 72578377. The next prime is 72578417. The reversal of 72578384 is 48387527.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41886784 + 30691600 = 6472^2 + 5540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2268059 + ... + 2268090.

It is an arithmetic number, because the mean of its divisors is an integer number (14062065).

Almost surely, 2^72578384 is an apocalyptic number.

It is an amenable number.

72578384 is a deficient number, since it is larger than the sum of its proper divisors (68042266).

72578384 is a wasteful number, since it uses less digits than its factorization.

72578384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536157 (or 4536151 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 72578384 is about 8519.2948064966. The cubic root of 72578384 is about 417.1277646024.

The spelling of 72578384 in words is "seventy-two million, five hundred seventy-eight thousand, three hundred eighty-four".