72763640 has 32 divisors (see below), whose sum is σ = 166030560. Its totient is φ = 28694400.

The previous prime is 72763637. The next prime is 72763657. The reversal of 72763640 is 4636727.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 72763640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9971 + ... + 15650.

It is an arithmetic number, because the mean of its divisors is an integer number (5188455).

Almost surely, 2^72763640 is an apocalyptic number.

It is an amenable number.

72763640 is an abundant number, since it is smaller than the sum of its proper divisors (93266920).

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

72763640 is a wasteful number, since it uses less digits than its factorization.

72763640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25703 (or 25699 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 72763640 is about 8530.1606081011. The cubic root of 72763640 is about 417.4823686484.

The spelling of 72763640 in words is "seventy-two million, seven hundred sixty-three thousand, six hundred forty".