72780696 has 24 divisors (see below), whose sum is σ = 197114580. Its totient is φ = 24260208.

The previous prime is 72780683. The next prime is 72780707. The reversal of 72780696 is 69608727.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505350 + ... + 505493.

Almost surely, 2^72780696 is an apocalyptic number.

It is an amenable number.

72780696 is an abundant number, since it is smaller than the sum of its proper divisors (124333884).

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

72780696 is a wasteful number, since it uses less digits than its factorization.

72780696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010855 (or 1010848 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 72780696 is about 8531.1602962317. The cubic root of 72780696 is about 417.5149857769.

The spelling of 72780696 in words is "seventy-two million, seven hundred eighty thousand, six hundred ninety-six".