7990420 has 36 divisors (see below), whose sum is σ = 17225460. Its totient is φ = 3113088.

The previous prime is 7990379. The next prime is 7990427. The reversal of 7990420 is 240997.

It can be written as a sum of positive squares in 2 ways, for example, as 2172676 + 5817744 = 1474^2 + 2412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89736 + ... + 89824.

It is an arithmetic number, because the mean of its divisors is an integer number (478485).

Almost surely, 2^7990420 is an apocalyptic number.

It is an amenable number.

7990420 is an abundant number, since it is smaller than the sum of its proper divisors (9235040).

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

7990420 is a wasteful number, since it uses less digits than its factorization.

7990420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 7990420 is about 2826.7330967037. The cubic root of 7990420 is about 199.9201347786.

The spelling of 7990420 in words is "seven million, nine hundred ninety thousand, four hundred twenty".