72889994 has 8 divisors (see below), whose sum is σ = 109611588. Its totient is φ = 36352800.

The previous prime is 72889969. The next prime is 72890017. The reversal of 72889994 is 49998827.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72675625 + 214369 = 8525^2 + 463^2 .

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, 45107 + ... + 46694.

Almost surely, 2^72889994 is an apocalyptic number.

72889994 is a deficient number, since it is larger than the sum of its proper divisors (36721594).

72889994 is a wasteful number, since it uses less digits than its factorization.

72889994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92200.

The product of its digits is 2612736, while the sum is 56.

The square root of 72889994 is about 8537.5637040083. The cubic root of 72889994 is about 417.7238815013.

The spelling of 72889994 in words is "seventy-two million, eight hundred eighty-nine thousand, nine hundred ninety-four".