7997398080 has 448 divisors, whose sum is σ = 30829178880. Its totient is φ = 1716903936.

The previous prime is 7997398067. The next prime is 7997398093. The reversal of 7997398080 is 808937997.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7997398067) and next prime (7997398093).

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 9118602 + ... + 9119478.

Almost surely, 2^7997398080 is an apocalyptic number.

7997398080 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 7997398080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15414589440).

7997398080 is an abundant number, since it is smaller than the sum of its proper divisors (22831780800).

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

7997398080 is a wasteful number, since it uses less digits than its factorization.

7997398080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 60.

The square root of 7997398080 is about 89428.1727421510. The cubic root of 7997398080 is about 1999.7831498222.

The spelling of 7997398080 in words is "seven billion, nine hundred ninety-seven million, three hundred ninety-eight thousand, eighty".