72672394 has 4 divisors (see below), whose sum is σ = 109008594. Its totient is φ = 36336196.

The previous prime is 72672349. The next prime is 72672407. The reversal of 72672394 is 49327627.

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

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 15896169 = 7535^2 + 3987^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 18168097 + ... + 18168100.

Almost surely, 2^72672394 is an apocalyptic number.

72672394 is a deficient number, since it is larger than the sum of its proper divisors (36336200).

72672394 is a wasteful number, since it uses less digits than its factorization.

72672394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36336199.

The product of its digits is 127008, while the sum is 40.

The square root of 72672394 is about 8524.8104964275. The cubic root of 72672394 is about 417.3077872663.

The spelling of 72672394 in words is "seventy-two million, six hundred seventy-two thousand, three hundred ninety-four".