7940280864 has 48 divisors (see below), whose sum is σ = 20968089408. Its totient is φ = 2630906112.

The previous prime is 7940280857. The next prime is 7940280911. The reversal of 7940280864 is 4680820497.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231607 + ... + 263670.

It is an arithmetic number, because the mean of its divisors is an integer number (436835196).

Almost surely, 2^7940280864 is an apocalyptic number.

It is an amenable number.

7940280864 is an abundant number, since it is smaller than the sum of its proper divisors (13027808544).

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

7940280864 is a wasteful number, since it uses less digits than its factorization.

7940280864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495457 (or 495449 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 7940280864 is about 89108.2536244539. The cubic root of 7940280864 is about 1995.0109704738.

The spelling of 7940280864 in words is "seven billion, nine hundred forty million, two hundred eighty thousand, eight hundred sixty-four".