72759998 has 4 divisors (see below), whose sum is σ = 109140000. Its totient is φ = 36379998.

The previous prime is 72759989. The next prime is 72760003. The reversal of 72759998 is 89995727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89995727 = 97 ⋅927791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18189998 + ... + 18190001.

It is an arithmetic number, because the mean of its divisors is an integer number (27285000).

Almost surely, 2^72759998 is an apocalyptic number.

72759998 is a deficient number, since it is larger than the sum of its proper divisors (36380002).

72759998 is a wasteful number, since it uses less digits than its factorization.

72759998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36380001.

The product of its digits is 2857680, while the sum is 56.

The square root of 72759998 is about 8529.9471276204. The cubic root of 72759998 is about 417.4754031907.

The spelling of 72759998 in words is "seventy-two million, seven hundred fifty-nine thousand, nine hundred ninety-eight".