7912912884 has 12 divisors (see below), whose sum is σ = 18463463424. Its totient is φ = 2637637624.

The previous prime is 7912912849. The next prime is 7912912937. The reversal of 7912912884 is 4882192197.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×7912912884² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329704692 + ... + 329704715.

It is an arithmetic number, because the mean of its divisors is an integer number (1538621952).

Almost surely, 2^7912912884 is an apocalyptic number.

It is an amenable number.

7912912884 is an abundant number, since it is smaller than the sum of its proper divisors (10550550540).

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

7912912884 is a wasteful number, since it uses less digits than its factorization.

7912912884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659409414 (or 659409412 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 7912912884 is about 88954.5551616105. Note that the first 3 decimals coincide. The cubic root of 7912912884 is about 1992.7162459993.

The spelling of 7912912884 in words is "seven billion, nine hundred twelve million, nine hundred twelve thousand, eight hundred eighty-four".