72162258 has 32 divisors (see below), whose sum is σ = 165279744. Its totient is φ = 20575632.

The previous prime is 72162257. The next prime is 72162269. The reversal of 72162258 is 85226127.

It is not an unprimeable number, because it can be changed into a prime (72162253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23191 + ... + 26117.

It is an arithmetic number, because the mean of its divisors is an integer number (5164992).

Almost surely, 2^72162258 is an apocalyptic number.

72162258 is an abundant number, since it is smaller than the sum of its proper divisors (93117486).

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

72162258 is a wasteful number, since it uses less digits than its factorization.

72162258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526.

The product of its digits is 13440, while the sum is 33.

The square root of 72162258 is about 8494.8371379327. The cubic root of 72162258 is about 416.3290396308.

The spelling of 72162258 in words is "seventy-two million, one hundred sixty-two thousand, two hundred fifty-eight".