72830639 has 16 divisors (see below), whose sum is σ = 85631040. Its totient is φ = 60652800.

The previous prime is 72830623. The next prime is 72830663. The reversal of 72830639 is 93603827.

It is a cyclic number.

It is not a de Polignac number, because 72830639 - 2⁴ = 72830623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72830609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39539 + ... + 41339.

It is an arithmetic number, because the mean of its divisors is an integer number (5351940).

Almost surely, 2^72830639 is an apocalyptic number.

72830639 is a deficient number, since it is larger than the sum of its proper divisors (12800401).

72830639 is a wasteful number, since it uses less digits than its factorization.

72830639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 72830639 is about 8534.0868873008. The cubic root of 72830639 is about 417.6104652299.

The spelling of 72830639 in words is "seventy-two million, eight hundred thirty thousand, six hundred thirty-nine".