72613866 has 32 divisors (see below), whose sum is σ = 156723840. Its totient is φ = 22296384.

The previous prime is 72613861. The next prime is 72613889. The reversal of 72613866 is 66831627.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (72613861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71176 + ... + 72188.

It is an arithmetic number, because the mean of its divisors is an integer number (4897620).

Almost surely, 2^72613866 is an apocalyptic number.

72613866 is an abundant number, since it is smaller than the sum of its proper divisors (84109974).

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

72613866 is a wasteful number, since it uses less digits than its factorization.

72613866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950.

The product of its digits is 72576, while the sum is 39.

The square root of 72613866 is about 8521.3770014007. The cubic root of 72613866 is about 417.1957284382.

The spelling of 72613866 in words is "seventy-two million, six hundred thirteen thousand, eight hundred sixty-six".