867996780 has 72 divisors (see below), whose sum is σ = 2827199088. Its totient is φ = 198398592.

The previous prime is 867996769. The next prime is 867996781. The reversal of 867996780 is 87699768.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (867996781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144679 + ... + 150558.

It is an arithmetic number, because the mean of its divisors is an integer number (39266654).

Almost surely, 2^867996780 is an apocalyptic number.

It is an amenable number.

867996780 is an abundant number, since it is smaller than the sum of its proper divisors (1959202308).

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

867996780 is a wasteful number, since it uses less digits than its factorization.

867996780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295263 (or 295254 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The square root of 867996780 is about 29461.7850783010. The cubic root of 867996780 is about 953.9070049862.

The spelling of 867996780 in words is "eight hundred sixty-seven million, nine hundred ninety-six thousand, seven hundred eighty".