7806138 has 8 divisors (see below), whose sum is σ = 15612288. Its totient is φ = 2602044.

The previous prime is 7806059. The next prime is 7806151. The reversal of 7806138 is 8316087.

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

7806138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 7806099 and 7806108.

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, 650506 + ... + 650517.

It is an arithmetic number, because the mean of its divisors is an integer number (1951536).

Almost surely, 2^7806138 is an apocalyptic number.

7806138 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.

7806138 is a wasteful number, since it uses less digits than its factorization.

7806138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301028.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 7806138 is about 2793.9466709299. The cubic root of 7806138 is about 198.3712552930.

The spelling of 7806138 in words is "seven million, eight hundred six thousand, one hundred thirty-eight".