7994391552 has 440 divisors, whose sum is σ = 27939093600. Its totient is φ = 2275983360.

The previous prime is 7994391547. The next prime is 7994391557. The reversal of 7994391552 is 2551934997.

It is an interprime number because it is at equal distance from previous prime (7994391547) and next prime (7994391557).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7994391557) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28449652 + ... + 28449932.

It is an arithmetic number, because the mean of its divisors is an integer number (63497940).

Almost surely, 2^7994391552 is an apocalyptic number.

7994391552 is a gapful number since it is divisible by the number (72) 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 7994391552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13969546800).

7994391552 is an abundant number, since it is smaller than the sum of its proper divisors (19944702048).

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

7994391552 is an equidigital number, since it uses as much as digits as its factorization.

7994391552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 293 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The square root of 7994391552 is about 89411.3614257159. The cubic root of 7994391552 is about 1999.5325200731.

The spelling of 7994391552 in words is "seven billion, nine hundred ninety-four million, three hundred ninety-one thousand, five hundred fifty-two".