7990780 has 24 divisors (see below), whose sum is σ = 19178208. Its totient is φ = 2739648.

The previous prime is 7990751. The next prime is 7990789. The reversal of 7990780 is 870997.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28399 + ... + 28678.

It is an arithmetic number, because the mean of its divisors is an integer number (799092).

Almost surely, 2^7990780 is an apocalyptic number.

7990780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7990780 is an abundant number, since it is smaller than the sum of its proper divisors (11187428).

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

7990780 is a wasteful number, since it uses less digits than its factorization.

7990780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57093 (or 57091 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 7990780 is about 2826.7967737352. The cubic root of 7990780 is about 199.9231371309.

The spelling of 7990780 in words is "seven million, nine hundred ninety thousand, seven hundred eighty".