7845940 has 12 divisors (see below), whose sum is σ = 16476516. Its totient is φ = 3138368.

The previous prime is 7845931. The next prime is 7845947. The reversal of 7845940 is 495487.

It can be written as a sum of positive squares in 2 ways, for example, as 992016 + 6853924 = 996^2 + 2618^2 .

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 7845940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7845947) 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 3 ways as a sum of consecutive naturals, for example, 196129 + ... + 196168.

It is an arithmetic number, because the mean of its divisors is an integer number (1373043).

Almost surely, 2^7845940 is an apocalyptic number.

It is an amenable number.

7845940 is an abundant number, since it is smaller than the sum of its proper divisors (8630576).

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

7845940 is a wasteful number, since it uses less digits than its factorization.

7845940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392306 (or 392304 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 7845940 is about 2801.0605134484. The cubic root of 7845940 is about 198.7078362096.

It can be divided in two parts, 784 and 5940, that added together give a square (6724 = 82²).

The spelling of 7845940 in words is "seven million, eight hundred forty-five thousand, nine hundred forty".