864900980 has 12 divisors (see below), whose sum is σ = 1816292100. Its totient is φ = 345960384.

The previous prime is 864900977. The next prime is 864901013. The reversal of 864900980 is 89009468.

It can be written as a sum of positive squares in 2 ways, for example, as 161696656 + 703204324 = 12716^2 + 26518^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622505 + ... + 21622544.

It is an arithmetic number, because the mean of its divisors is an integer number (151357675).

Almost surely, 2^864900980 is an apocalyptic number.

It is an amenable number.

864900980 is an abundant number, since it is smaller than the sum of its proper divisors (951391120).

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

864900980 is a wasteful number, since it uses less digits than its factorization.

864900980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43245058 (or 43245056 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 864900980 is about 29409.1989010241. The cubic root of 864900980 is about 952.7715848253.

The spelling of 864900980 in words is "eight hundred sixty-four million, nine hundred thousand, nine hundred eighty".