7808080 has 80 divisors (see below), whose sum is σ = 21141504. Its totient is φ = 2626560.

The previous prime is 7808051. The next prime is 7808093. The reversal of 7808080 is 808087.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7808080² = 121932226572800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40785 + ... + 40975.

Almost surely, 2^7808080 is an apocalyptic number.

7808080 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 7808080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10570752).

7808080 is an abundant number, since it is smaller than the sum of its proper divisors (13333424).

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

7808080 is a wasteful number, since it uses less digits than its factorization.

7808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 7808080 is about 2794.2941863734. The cubic root of 7808080 is about 198.3877041027.

The spelling of 7808080 in words is "seven million, eight hundred eight thousand, eighty".