7845644 has 6 divisors (see below), whose sum is σ = 13729884. Its totient is φ = 3922820.

The previous prime is 7845641. The next prime is 7845647. The reversal of 7845644 is 4465487.

It is an interprime number because it is at equal distance from previous prime (7845641) and next prime (7845647).

It is a d-powerful number, because it can be written as 7⁵ + 8³ + 4⁴ + 5⁹ + 6⁸ + 4⁵ + 4¹¹ .

It is a junction number, because it is equal to n+sod(n) for n = 7845598 and 7845607.

It is not an unprimeable number, because it can be changed into a prime (7845641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980702 + ... + 980709.

It is an arithmetic number, because the mean of its divisors is an integer number (2288314).

Almost surely, 2^7845644 is an apocalyptic number.

It is an amenable number.

7845644 is a deficient number, since it is larger than the sum of its proper divisors (5884240).

7845644 is a wasteful number, since it uses less digits than its factorization.

7845644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961415 (or 1961413 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 7845644 is about 2801.0076758195. The cubic root of 7845644 is about 198.7053373266.

The spelling of 7845644 in words is "seven million, eight hundred forty-five thousand, six hundred forty-four".