72911798 has 4 divisors (see below), whose sum is σ = 109367700. Its totient is φ = 36455898.

The previous prime is 72911779. The next prime is 72911801. The reversal of 72911798 is 89711927.

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

It is a super-2 number, since 2×72911798² = 10632260575185608, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 18227948 + ... + 18227951.

It is an arithmetic number, because the mean of its divisors is an integer number (27341925).

Almost surely, 2^72911798 is an apocalyptic number.

72911798 is a deficient number, since it is larger than the sum of its proper divisors (36455902).

72911798 is a wasteful number, since it uses less digits than its factorization.

72911798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36455901.

The product of its digits is 63504, while the sum is 44.

The square root of 72911798 is about 8538.8405536115. The cubic root of 72911798 is about 417.7655293919.

The spelling of 72911798 in words is "seventy-two million, nine hundred eleven thousand, seven hundred ninety-eight".