72380738 has 4 divisors (see below), whose sum is σ = 108571110. Its totient is φ = 36190368.

The previous prime is 72380699. The next prime is 72380743. The reversal of 72380738 is 83708327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83708327 = 89 ⋅940543.

It can be written as a sum of positive squares in only one way, i.e., 38775529 + 33605209 = 6227^2 + 5797^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18095183 + ... + 18095186.

Almost surely, 2^72380738 is an apocalyptic number.

72380738 is a deficient number, since it is larger than the sum of its proper divisors (36190372).

72380738 is a wasteful number, since it uses less digits than its factorization.

72380738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36190371.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 72380738 is about 8507.6869947125. The cubic root of 72380738 is about 416.7487785550.

The spelling of 72380738 in words is "seventy-two million, three hundred eighty thousand, seven hundred thirty-eight".