7986390 has 64 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 2016000.

The previous prime is 7986389. The next prime is 7986401. The reversal of 7986390 is 936897.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52815 + ... + 52965.

It is an arithmetic number, because the mean of its divisors is an integer number (316008).

Almost surely, 2^7986390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7986390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10112256).

7986390 is an abundant number, since it is smaller than the sum of its proper divisors (12238122).

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

7986390 is a wasteful number, since it uses less digits than its factorization.

7986390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 7986390 is about 2826.0201697794. The cubic root of 7986390 is about 199.8865189558.

The spelling of 7986390 in words is "seven million, nine hundred eighty-six thousand, three hundred ninety".