7939390 has 8 divisors (see below), whose sum is σ = 14290920. Its totient is φ = 3175752.

The previous prime is 7939387. The next prime is 7939403. The reversal of 7939390 is 939397.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 396960 + ... + 396979.

It is an arithmetic number, because the mean of its divisors is an integer number (1786365).

Almost surely, 2^7939390 is an apocalyptic number.

7939390 is a deficient number, since it is larger than the sum of its proper divisors (6351530).

7939390 is a wasteful number, since it uses less digits than its factorization.

7939390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793946.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 7939390 is about 2817.6923181923. The cubic root of 7939390 is about 199.4936357247.

The spelling of 7939390 in words is "seven million, nine hundred thirty-nine thousand, three hundred ninety".