72111458 has 16 divisors (see below), whose sum is σ = 112250880. Its totient is φ = 34702416.

The previous prime is 72111451. The next prime is 72111461. The reversal of 72111458 is 85411127.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 72111458.

It is not an unprimeable number, because it can be changed into a prime (72111451) by changing a digit.

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, 18335 + ... + 21917.

It is an arithmetic number, because the mean of its divisors is an integer number (7015680).

Almost surely, 2^72111458 is an apocalyptic number.

72111458 is a deficient number, since it is larger than the sum of its proper divisors (40139422).

72111458 is a wasteful number, since it uses less digits than its factorization.

72111458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961.

The product of its digits is 2240, while the sum is 29.

The square root of 72111458 is about 8491.8465600834. The cubic root of 72111458 is about 416.2313224372.

The spelling of 72111458 in words is "seventy-two million, one hundred eleven thousand, four hundred fifty-eight".