7845138 has 96 divisors (see below), whose sum is σ = 21340800. Its totient is φ = 2032128.

The previous prime is 7845137. The next prime is 7845151. The reversal of 7845138 is 8315487.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7845137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69370 + ... + 69482.

It is an arithmetic number, because the mean of its divisors is an integer number (222300).

Almost surely, 2^7845138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7845138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10670400).

7845138 is an abundant number, since it is smaller than the sum of its proper divisors (13495662).

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

7845138 is a wasteful number, since it uses less digits than its factorization.

7845138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 173 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 7845138 is about 2800.9173497267. The cubic root of 7845138 is about 198.7010654418.

The spelling of 7845138 in words is "seven million, eight hundred forty-five thousand, one hundred thirty-eight".