7905138 has 8 divisors (see below), whose sum is σ = 15810288. Its totient is φ = 2635044.

The previous prime is 7905137. The next prime is 7905143. The reversal of 7905138 is 8315097.

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

7905138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 7905099 and 7905108.

It is not an unprimeable number, because it can be changed into a prime (7905137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658756 + ... + 658767.

It is an arithmetic number, because the mean of its divisors is an integer number (1976286).

Almost surely, 2^7905138 is an apocalyptic number.

7905138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7905138 is a wasteful number, since it uses less digits than its factorization.

7905138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317528.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 7905138 is about 2811.6077251281. The cubic root of 7905138 is about 199.2063380026.

The spelling of 7905138 in words is "seven million, nine hundred five thousand, one hundred thirty-eight".