7999290 has 128 divisors (see below), whose sum is σ = 23950080. Its totient is φ = 1886976.

The previous prime is 7999283. The next prime is 7999297. The reversal of 7999290 is 929997.

It is an interprime number because it is at equal distance from previous prime (7999283) and next prime (7999297).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999297) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 150904 + ... + 150956.

It is an arithmetic number, because the mean of its divisors is an integer number (187110).

Almost surely, 2^7999290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7999290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11975040).

7999290 is an abundant number, since it is smaller than the sum of its proper divisors (15950790).

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

7999290 is a wasteful number, since it uses less digits than its factorization.

7999290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 7999290 is about 2828.3016105076. The cubic root of 7999290 is about 199.9940831583.

The spelling of 7999290 in words is "seven million, nine hundred ninety-nine thousand, two hundred ninety".