72100384 has 12 divisors (see below), whose sum is σ = 141947694. Its totient is φ = 36050176.

The previous prime is 72100373. The next prime is 72100393. The reversal of 72100384 is 48300127.

It can be written as a sum of positive squares in only one way, i.e., 60403984 + 11696400 = 7772^2 + 3420^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126537 + ... + 1126600.

Almost surely, 2^72100384 is an apocalyptic number.

It is an amenable number.

72100384 is a deficient number, since it is larger than the sum of its proper divisors (69847310).

72100384 is a wasteful number, since it uses less digits than its factorization.

72100384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253147 (or 2253139 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 72100384 is about 8491.1944978313. The cubic root of 72100384 is about 416.2100147663.

The spelling of 72100384 in words is "seventy-two million, one hundred thousand, three hundred eighty-four".