72709982 has 4 divisors (see below), whose sum is σ = 109064976. Its totient is φ = 36354990.

The previous prime is 72709981. The next prime is 72709993. The reversal of 72709982 is 28990727.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72709981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18177494 + ... + 18177497.

It is an arithmetic number, because the mean of its divisors is an integer number (27266244).

Almost surely, 2^72709982 is an apocalyptic number.

72709982 is a deficient number, since it is larger than the sum of its proper divisors (36354994).

72709982 is a wasteful number, since it uses less digits than its factorization.

72709982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36354993.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 72709982 is about 8527.0148352164. The cubic root of 72709982 is about 417.3797222459.

The spelling of 72709982 in words is "seventy-two million, seven hundred nine thousand, nine hundred eighty-two".