72784998 has 48 divisors (see below), whose sum is σ = 185277456. Its totient is φ = 20358720.

The previous prime is 72784979. The next prime is 72785021. The reversal of 72784998 is 89948727.

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 in 23 ways as a sum of consecutive naturals, for example, 11565 + ... + 16712.

It is an arithmetic number, because the mean of its divisors is an integer number (3859947).

Almost surely, 2^72784998 is an apocalyptic number.

72784998 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

72784998 is an abundant number, since it is smaller than the sum of its proper divisors (112492458).

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

72784998 is a wasteful number, since it uses less digits than its factorization.

72784998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28309 (or 28306 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 72784998 is about 8531.4124270252. The cubic root of 72784998 is about 417.5232119237.

The spelling of 72784998 in words is "seventy-two million, seven hundred eighty-four thousand, nine hundred ninety-eight".