82287780 has 48 divisors (see below), whose sum is σ = 234193344. Its totient is φ = 21582720.

The previous prime is 82287773. The next prime is 82287791. The reversal of 82287780 is 8778228.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7582 + ... + 14901.

It is an arithmetic number, because the mean of its divisors is an integer number (4879028).

Almost surely, 2^82287780 is an apocalyptic number.

It is an amenable number.

82287780 is an abundant number, since it is smaller than the sum of its proper divisors (151905564).

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

82287780 is a wasteful number, since it uses less digits than its factorization.

82287780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22556 (or 22554 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 82287780 is about 9071.2612133044. The cubic root of 82287780 is about 434.9557888744.

The spelling of 82287780 in words is "eighty-two million, two hundred eighty-seven thousand, seven hundred eighty".