7904420 has 24 divisors (see below), whose sum is σ = 16914744. Its totient is φ = 3101696.

The previous prime is 7904419. The next prime is 7904423. The reversal of 7904420 is 244097.

It can be written as a sum of positive squares in 4 ways, for example, as 850084 + 7054336 = 922^2 + 2656^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7904420.

It is not an unprimeable number, because it can be changed into a prime (7904423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669 + ... + 4788.

It is an arithmetic number, because the mean of its divisors is an integer number (704781).

Almost surely, 2^7904420 is an apocalyptic number.

It is an amenable number.

7904420 is an abundant number, since it is smaller than the sum of its proper divisors (9010324).

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

7904420 is a wasteful number, since it uses less digits than its factorization.

7904420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519 (or 7517 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 7904420 is about 2811.4800372757. The cubic root of 7904420 is about 199.2003067150.

The spelling of 7904420 in words is "seven million, nine hundred four thousand, four hundred twenty".