7939490 has 32 divisors (see below), whose sum is σ = 15528240. Its totient is φ = 2905344.

The previous prime is 7939447. The next prime is 7939499. The reversal of 7939490 is 949397.

It can be written as a sum of positive squares in 8 ways, for example, as 579121 + 7360369 = 761^2 + 2713^2 .

It is not an unprimeable number, because it can be changed into a prime (7939499) 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 15 ways as a sum of consecutive naturals, for example, 20216 + ... + 20604.

Almost surely, 2^7939490 is an apocalyptic number.

7939490 is a deficient number, since it is larger than the sum of its proper divisors (7588750).

7939490 is a wasteful number, since it uses less digits than its factorization.

7939490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 7939490 is about 2817.7100631541. The cubic root of 7939490 is about 199.4944732903.

The spelling of 7939490 in words is "seven million, nine hundred thirty-nine thousand, four hundred ninety".