72673994 has 12 divisors (see below), whose sum is σ = 112070322. Its totient is φ = 35319240.

The previous prime is 72673987. The next prime is 72674003. The reversal of 72673994 is 49937627.

It can be written as a sum of positive squares in only one way, i.e., 48121969 + 24552025 = 6937^2 + 4955^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72839 + ... + 73829.

Almost surely, 2^72673994 is an apocalyptic number.

72673994 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

72673994 is a deficient number, since it is larger than the sum of its proper divisors (39396328).

72673994 is an frugal number, since it uses more digits than its factorization.

72673994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021 (or 1030 counting only the distinct ones).

The product of its digits is 571536, while the sum is 47.

The square root of 72673994 is about 8524.9043396392. The cubic root of 72673994 is about 417.3108498119.

The spelling of 72673994 in words is "seventy-two million, six hundred seventy-three thousand, nine hundred ninety-four".