72277686 has 48 divisors (see below), whose sum is σ = 174479760. Its totient is φ = 21470400.

The previous prime is 72277679. The next prime is 72277703. The reversal of 72277686 is 68677227.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1461 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (3634995).

Almost surely, 2^72277686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72277686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87239880).

72277686 is an abundant number, since it is smaller than the sum of its proper divisors (102202074).

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

72277686 is a wasteful number, since it uses less digits than its factorization.

72277686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10701 (or 10698 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 72277686 is about 8501.6284322476. The cubic root of 72277686 is about 416.5509027377.

The spelling of 72277686 in words is "seventy-two million, two hundred seventy-seven thousand, six hundred eighty-six".