7940280865 has 32 divisors (see below), whose sum is σ = 11013615360. Its totient is φ = 5431296000.

The previous prime is 7940280857. The next prime is 7940280911. The reversal of 7940280865 is 5680820497.

It is not a de Polignac number, because 7940280865 - 2³ = 7940280857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2383521 + ... + 2386849.

It is an arithmetic number, because the mean of its divisors is an integer number (344175480).

Almost surely, 2^7940280865 is an apocalyptic number.

It is an amenable number.

7940280865 is a deficient number, since it is larger than the sum of its proper divisors (3073334495).

7940280865 is a wasteful number, since it uses less digits than its factorization.

7940280865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 7940280865 is about 89108.2536300650. The cubic root of 7940280865 is about 1995.0109705575.

The spelling of 7940280865 in words is "seven billion, nine hundred forty million, two hundred eighty thousand, eight hundred sixty-five".