72941138 has 4 divisors (see below), whose sum is σ = 109411710. Its totient is φ = 36470568.

The previous prime is 72941111. The next prime is 72941149. The reversal of 72941138 is 83114927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 8025889 = 8057^2 + 2833^2 .

It is a super-2 number, since 2×72941138² = 10640819225470088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72941098 and 72941107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18235283 + ... + 18235286.

Almost surely, 2^72941138 is an apocalyptic number.

72941138 is a deficient number, since it is larger than the sum of its proper divisors (36470572).

72941138 is a wasteful number, since it uses less digits than its factorization.

72941138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36470571.

The product of its digits is 12096, while the sum is 35.

The square root of 72941138 is about 8540.5584126566. The cubic root of 72941138 is about 417.8215587187.

The spelling of 72941138 in words is "seventy-two million, nine hundred forty-one thousand, one hundred thirty-eight".