72905998 has 32 divisors (see below), whose sum is σ = 125452800. Its totient is φ = 31452960.

The previous prime is 72905993. The next prime is 72906007. The reversal of 72905998 is 89950927.

72905998 is a Rhonda number in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72905993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74911 + ... + 75877.

It is an arithmetic number, because the mean of its divisors is an integer number (3920400).

Almost surely, 2^72905998 is an apocalyptic number.

72905998 is a deficient number, since it is larger than the sum of its proper divisors (52546802).

72905998 is a wasteful number, since it uses less digits than its factorization.

72905998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 72905998 is about 8538.5009222931. The cubic root of 72905998 is about 417.7544516039.

The spelling of 72905998 in words is "seventy-two million, nine hundred five thousand, nine hundred ninety-eight".