7877884640 has 48 divisors (see below), whose sum is σ = 18705103200. Its totient is φ = 3135306240.

The previous prime is 7877884627. The next prime is 7877884697. The reversal of 7877884640 is 464887787.

It is a super-2 number, since 2×7877884640² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7877884640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91871 + ... + 155550.

It is an arithmetic number, because the mean of its divisors is an integer number (389689650).

Almost surely, 2^7877884640 is an apocalyptic number.

It is an amenable number.

7877884640 is an abundant number, since it is smaller than the sum of its proper divisors (10827218560).

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

7877884640 is a wasteful number, since it uses less digits than its factorization.

7877884640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247635 (or 247627 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 59.

The square root of 7877884640 is about 88757.4483635036. The cubic root of 7877884640 is about 1989.7714980514.

The spelling of 7877884640 in words is "seven billion, eight hundred seventy-seven million, eight hundred eighty-four thousand, six hundred forty".