7118979840 has 720 divisors, whose sum is σ = 30877906752. Its totient is φ = 1528823808.

The previous prime is 7118979811. The next prime is 7118979859. The reversal of 7118979840 is 489798117.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12337632 + ... + 12338208.

Almost surely, 2^7118979840 is an apocalyptic number.

7118979840 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 7118979840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15438953376).

7118979840 is an abundant number, since it is smaller than the sum of its proper divisors (23758926912).

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

7118979840 is a wasteful number, since it uses less digits than its factorization.

7118979840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 7118979840 is about 84374.0471946202. The cubic root of 7118979840 is about 1923.7084575460.

The spelling of 7118979840 in words is "seven billion, one hundred eighteen million, nine hundred seventy-nine thousand, eight hundred forty".