72039934 has 4 divisors (see below), whose sum is σ = 108059904. Its totient is φ = 36019966.

The previous prime is 72039923. The next prime is 72039949. The reversal of 72039934 is 43993027.

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

It is a junction number, because it is equal to n+sod(n) for n = 72039893 and 72039902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18009982 + ... + 18009985.

It is an arithmetic number, because the mean of its divisors is an integer number (27014976).

Almost surely, 2^72039934 is an apocalyptic number.

72039934 is a deficient number, since it is larger than the sum of its proper divisors (36019970).

72039934 is a wasteful number, since it uses less digits than its factorization.

72039934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36019969.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 72039934 is about 8487.6341815608. The cubic root of 72039934 is about 416.0936634205.

The spelling of 72039934 in words is "seventy-two million, thirty-nine thousand, nine hundred thirty-four".