72775998 has 12 divisors (see below), whose sum is σ = 157681368. Its totient is φ = 24258660.

The previous prime is 72775991. The next prime is 72776009. The reversal of 72775998 is 89957727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72775991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2021538 + ... + 2021573.

It is an arithmetic number, because the mean of its divisors is an integer number (13140114).

Almost surely, 2^72775998 is an apocalyptic number.

72775998 is an abundant number, since it is smaller than the sum of its proper divisors (84905370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72775998 is a wasteful number, since it uses less digits than its factorization.

72775998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043119 (or 4043116 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 72775998 is about 8530.8849482337. The cubic root of 72775998 is about 417.5060020412.

The spelling of 72775998 in words is "seventy-two million, seven hundred seventy-five thousand, nine hundred ninety-eight".