7990045 has 16 divisors (see below), whose sum is σ = 11214720. Its totient is φ = 5350464.

The previous prime is 7990001. The next prime is 7990057. The reversal of 7990045 is 5400997.

7990045 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7990045 - 2¹⁷ = 7858973 is a prime.

7990045 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150 + ... + 4159.

It is an arithmetic number, because the mean of its divisors is an integer number (700920).

Almost surely, 2^7990045 is an apocalyptic number.

It is an amenable number.

7990045 is a deficient number, since it is larger than the sum of its proper divisors (3224675).

7990045 is a wasteful number, since it uses less digits than its factorization.

7990045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5364.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 7990045 is about 2826.6667649371. Note that the first 3 decimals coincide. The cubic root of 7990045 is about 199.9170072324.

The spelling of 7990045 in words is "seven million, nine hundred ninety thousand, forty-five".