72818830 has 32 divisors (see below), whose sum is σ = 157685760. Its totient is φ = 23652000.

The previous prime is 72818813. The next prime is 72818857. The reversal of 72818830 is 3881827.

It is a self number, because there is not a number n which added to its sum of digits gives 72818830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26046 + ... + 28705.

It is an arithmetic number, because the mean of its divisors is an integer number (4927680).

Almost surely, 2^72818830 is an apocalyptic number.

72818830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72818830 is an abundant number, since it is smaller than the sum of its proper divisors (84866930).

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

72818830 is a wasteful number, since it uses less digits than its factorization.

72818830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54784.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 72818830 is about 8533.3949867564. The cubic root of 72818830 is about 417.5878930972.

The spelling of 72818830 in words is "seventy-two million, eight hundred eighteen thousand, eight hundred thirty".