7906138 has 8 divisors (see below), whose sum is σ = 11877588. Its totient is φ = 3946944.

The previous prime is 7906127. The next prime is 7906163. The reversal of 7906138 is 8316097.

It can be written as a sum of positive squares in 2 ways, for example, as 5368489 + 2537649 = 2317^2 + 1593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231 + ... + 4162.

Almost surely, 2^7906138 is an apocalyptic number.

7906138 is a deficient number, since it is larger than the sum of its proper divisors (3971450).

7906138 is a wasteful number, since it uses less digits than its factorization.

7906138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7906138 is about 2811.7855537007. The cubic root of 7906138 is about 199.2147375160.

The spelling of 7906138 in words is "seven million, nine hundred six thousand, one hundred thirty-eight".