7908138 has 32 divisors (see below), whose sum is σ = 20085120. Its totient is φ = 2259360.

The previous prime is 7908107. The next prime is 7908139. The reversal of 7908138 is 8318097.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7908139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10083 + ... + 10838.

It is an arithmetic number, because the mean of its divisors is an integer number (627660).

Almost surely, 2^7908138 is an apocalyptic number.

7908138 is an abundant number, since it is smaller than the sum of its proper divisors (12176982).

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

7908138 is a wasteful number, since it uses less digits than its factorization.

7908138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20939 (or 20933 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 7908138 is about 2812.1411771104. The cubic root of 7908138 is about 199.2315344183.

The spelling of 7908138 in words is "seven million, nine hundred eight thousand, one hundred thirty-eight".