72739406 has 8 divisors (see below), whose sum is σ = 110110440. Its totient is φ = 36035928.

The previous prime is 72739397. The next prime is 72739417. The reversal of 72739406 is 60493727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72739406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166616 + ... + 167051.

It is an arithmetic number, because the mean of its divisors is an integer number (13763805).

Almost surely, 2^72739406 is an apocalyptic number.

72739406 is a deficient number, since it is larger than the sum of its proper divisors (37371034).

72739406 is a wasteful number, since it uses less digits than its factorization.

72739406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333778.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 72739406 is about 8528.7400007270. The cubic root of 72739406 is about 417.4360158678.

The spelling of 72739406 in words is "seventy-two million, seven hundred thirty-nine thousand, four hundred six".