7945990 has 32 divisors (see below), whose sum is σ = 16218720. Its totient is φ = 2778624.

The previous prime is 7945981. The next prime is 7946023. The reversal of 7945990 is 995497.

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 15 ways as a sum of consecutive naturals, for example, 862 + ... + 4078.

It is an arithmetic number, because the mean of its divisors is an integer number (506835).

Almost surely, 2^7945990 is an apocalyptic number.

7945990 is an abundant number, since it is smaller than the sum of its proper divisors (8272730).

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

7945990 is a wasteful number, since it uses less digits than its factorization.

7945990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 7945990 is about 2818.8632460621. The cubic root of 7945990 is about 199.5488999755.

The spelling of 7945990 in words is "seven million, nine hundred forty-five thousand, nine hundred ninety".