7913844 has 18 divisors (see below), whose sum is σ = 20004530. Its totient is φ = 2637936.

The previous prime is 7913833. The next prime is 7913887. The reversal of 7913844 is 4483197.

It is a happy number.

7913844 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6502500 + 1411344 = 2550^2 + 1188^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 219829 = 7913844 / (7 + 9 + 1 + 3 + 8 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 7913799 and 7913808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109879 + ... + 109950.

Almost surely, 2^7913844 is an apocalyptic number.

It is an amenable number.

7913844 is an abundant number, since it is smaller than the sum of its proper divisors (12090686).

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

7913844 is a wasteful number, since it uses less digits than its factorization.

7913844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219839 (or 219834 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7913844 is about 2813.1555236069. The cubic root of 7913844 is about 199.2794404205.

The spelling of 7913844 in words is "seven million, nine hundred thirteen thousand, eight hundred forty-four".