7913115840 has 336 divisors, whose sum is σ = 29448252000. Its totient is φ = 1794981888.

The previous prime is 7913115823. The next prime is 7913115841. The reversal of 7913115840 is 485113197.

It is a tau number, because it is divible by the number of its divisors (336).

It is not an unprimeable number, because it can be changed into a prime (7913115841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7008396 + ... + 7009524.

Almost surely, 2^7913115840 is an apocalyptic number.

7913115840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7913115840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14724126000).

7913115840 is an abundant number, since it is smaller than the sum of its proper divisors (21535136160).

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

7913115840 is a wasteful number, since it uses less digits than its factorization.

7913115840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 7913115840 is about 88955.6959390460. The cubic root of 7913115840 is about 1992.7332827200.

It can be divided in two parts, 7913 and 115840, that added together give a triangular number (123753 = T₄₉₇).

The spelling of 7913115840 in words is "seven billion, nine hundred thirteen million, one hundred fifteen thousand, eight hundred forty".