7904290 has 8 divisors (see below), whose sum is σ = 14227740. Its totient is φ = 3161712.

The previous prime is 7904279. The next prime is 7904291. The reversal of 7904290 is 924097.

It can be written as a sum of positive squares in 2 ways, for example, as 7745089 + 159201 = 2783^2 + 399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7904291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395205 + ... + 395224.

Almost surely, 2^7904290 is an apocalyptic number.

7904290 is a deficient number, since it is larger than the sum of its proper divisors (6323450).

7904290 is a wasteful number, since it uses less digits than its factorization.

7904290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790436.

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

The square root of 7904290 is about 2811.4569176852. The cubic root of 7904290 is about 199.1992146601.

The spelling of 7904290 in words is "seven million, nine hundred four thousand, two hundred ninety".