72861692 has 12 divisors (see below), whose sum is σ = 127592976. Its totient is φ = 36406560.

The previous prime is 72861673. The next prime is 72861707. The reversal of 72861692 is 29616827.

It is a super-2 number, since 2×72861692² = 10617652322205728, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1817 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (10632748).

Almost surely, 2^72861692 is an apocalyptic number.

It is an amenable number.

72861692 is a deficient number, since it is larger than the sum of its proper divisors (54731284).

72861692 is a wasteful number, since it uses less digits than its factorization.

72861692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12148 (or 12146 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 72861692 is about 8535.9060444689. The cubic root of 72861692 is about 417.6698093709.

The spelling of 72861692 in words is "seventy-two million, eight hundred sixty-one thousand, six hundred ninety-two".