7990038 has 36 divisors (see below), whose sum is σ = 20140380. Its totient is φ = 2282616.

The previous prime is 7990001. The next prime is 7990057. The reversal of 7990038 is 8300997.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7989984 and 7990011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3648 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (559455).

Almost surely, 2^7990038 is an apocalyptic number.

7990038 is an abundant number, since it is smaller than the sum of its proper divisors (12150342).

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

7990038 is a wasteful number, since it uses less digits than its factorization.

7990038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081 (or 9071 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 7990038 is about 2826.6655267293. The cubic root of 7990038 is about 199.9169488506.

The spelling of 7990038 in words is "seven million, nine hundred ninety thousand, thirty-eight".