864457980 has 48 divisors (see below), whose sum is σ = 2425810464. Its totient is φ = 230014720.

The previous prime is 864457969. The next prime is 864457987. The reversal of 864457980 is 89754468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864457987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12034 + ... + 43286.

It is an arithmetic number, because the mean of its divisors is an integer number (50537718).

Almost surely, 2^864457980 is an apocalyptic number.

It is an amenable number.

864457980 is an abundant number, since it is smaller than the sum of its proper divisors (1561352484).

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

864457980 is a wasteful number, since it uses less digits than its factorization.

864457980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31726 (or 31724 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 864457980 is about 29401.6662793114. Note that the first 3 decimals coincide. The cubic root of 864457980 is about 952.6088880139.

The spelling of 864457980 in words is "eight hundred sixty-four million, four hundred fifty-seven thousand, nine hundred eighty".