7216780 has 24 divisors (see below), whose sum is σ = 15365952. Its totient is φ = 2846592.

The previous prime is 7216763. The next prime is 7216787. The reversal of 7216780 is 876127.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7216787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (640248).

Almost surely, 2^7216780 is an apocalyptic number.

It is an amenable number.

7216780 is an abundant number, since it is smaller than the sum of its proper divisors (8149172).

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

7216780 is a wasteful number, since it uses less digits than its factorization.

7216780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5023 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 7216780 is about 2686.4065217312. The cubic root of 7216780 is about 193.2477689807.

The spelling of 7216780 in words is "seven million, two hundred sixteen thousand, seven hundred eighty".