7961876440 has 32 divisors (see below), whose sum is σ = 20473397280. Its totient is φ = 2729786112.

The previous prime is 7961876423. The next prime is 7961876453. The reversal of 7961876440 is 446781697.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 14217357 + ... + 14217916.

It is an arithmetic number, because the mean of its divisors is an integer number (639793665).

Almost surely, 2^7961876440 is an apocalyptic number.

7961876440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7961876440 is an abundant number, since it is smaller than the sum of its proper divisors (12511520840).

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

7961876440 is a wasteful number, since it uses less digits than its factorization.

7961876440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28435291 (or 28435287 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 7961876440 is about 89229.3474144017. The cubic root of 7961876440 is about 1996.8179767155.

The spelling of 7961876440 in words is "seven billion, nine hundred sixty-one million, eight hundred seventy-six thousand, four hundred forty".