72111892 has 12 divisors (see below), whose sum is σ = 133619220. Its totient is φ = 33934976.

The previous prime is 72111883. The next prime is 72111917. The reversal of 72111892 is 29811127.

It can be written as a sum of positive squares in 2 ways, for example, as 44275716 + 27836176 = 6654^2 + 5276^2 .

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 3 ways as a sum of consecutive naturals, for example, 530167 + ... + 530302.

It is an arithmetic number, because the mean of its divisors is an integer number (11134935).

Almost surely, 2^72111892 is an apocalyptic number.

It is an amenable number.

72111892 is a deficient number, since it is larger than the sum of its proper divisors (61507328).

72111892 is a wasteful number, since it uses less digits than its factorization.

72111892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060490 (or 1060488 counting only the distinct ones).

The product of its digits is 2016, while the sum is 31.

The square root of 72111892 is about 8491.8721139687. The cubic root of 72111892 is about 416.2321574595.

The spelling of 72111892 in words is "seventy-two million, one hundred eleven thousand, eight hundred ninety-two".