72255770 has 16 divisors (see below), whose sum is σ = 131708160. Its totient is φ = 28536144.

The previous prime is 72255769. The next prime is 72255847. The reversal of 72255770 is 7755227.

It is a self number, because there is not a number n which added to its sum of digits gives 72255770.

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 7 ways as a sum of consecutive naturals, for example, 44942 + ... + 46521.

It is an arithmetic number, because the mean of its divisors is an integer number (8231760).

Almost surely, 2^72255770 is an apocalyptic number.

72255770 is a deficient number, since it is larger than the sum of its proper divisors (59452390).

72255770 is a wasteful number, since it uses less digits than its factorization.

72255770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91549.

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 72255770 is about 8500.3394049885. The cubic root of 72255770 is about 416.5087963701.

The spelling of 72255770 in words is "seventy-two million, two hundred fifty-five thousand, seven hundred seventy".