72957822 has 32 divisors (see below), whose sum is σ = 167799552. Its totient is φ = 20715264.

The previous prime is 72957809. The next prime is 72957869. The reversal of 72957822 is 22875927.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1518 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (5243736).

Almost surely, 2^72957822 is an apocalyptic number.

72957822 is an abundant number, since it is smaller than the sum of its proper divisors (94841730).

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

72957822 is a wasteful number, since it uses less digits than its factorization.

72957822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832.

The product of its digits is 141120, while the sum is 42.

The square root of 72957822 is about 8541.5351079300. The cubic root of 72957822 is about 417.8534127298.

The spelling of 72957822 in words is "seventy-two million, nine hundred fifty-seven thousand, eight hundred twenty-two".