7912887840 has 384 divisors, whose sum is σ = 32539449600. Its totient is φ = 1770577920.

The previous prime is 7912887797. The next prime is 7912887859. The reversal of 7912887840 is 487882197.

It is a happy number.

It is a super-2 number, since 2×7912887840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 611356 + ... + 624164.

It is an arithmetic number, because the mean of its divisors is an integer number (84738150).

Almost surely, 2^7912887840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7912887840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16269724800).

7912887840 is an abundant number, since it is smaller than the sum of its proper divisors (24626561760).

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

7912887840 is a wasteful number, since it uses less digits than its factorization.

7912887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12857 (or 12843 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The square root of 7912887840 is about 88954.4143929912. The cubic root of 7912887840 is about 1992.7141437124.

The spelling of 7912887840 in words is "seven billion, nine hundred twelve million, eight hundred eighty-seven thousand, eight hundred forty".