72979730 has 8 divisors (see below), whose sum is σ = 131363532. Its totient is φ = 29191888.

The previous prime is 72979721. The next prime is 72979783. The reversal of 72979730 is 3797927.

It can be written as a sum of positive squares in 2 ways, for example, as 67749361 + 5230369 = 8231^2 + 2287^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648977 + ... + 3648996.

Almost surely, 2^72979730 is an apocalyptic number.

72979730 is a deficient number, since it is larger than the sum of its proper divisors (58383802).

72979730 is a wasteful number, since it uses less digits than its factorization.

72979730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297980.

The product of its (nonzero) digits is 166698, while the sum is 44.

The square root of 72979730 is about 8542.8174509350. The cubic root of 72979730 is about 417.8952333150.

The spelling of 72979730 in words is "seventy-two million, nine hundred seventy-nine thousand, seven hundred thirty".