7944438 has 16 divisors (see below), whose sum is σ = 15940080. Its totient is φ = 2639616.

The previous prime is 7944437. The next prime is 7944439. The reversal of 7944438 is 8344497.

It is an interprime number because it is at equal distance from previous prime (7944437) and next prime (7944439).

It is a super-2 number, since 2×7944438² = 126228190271688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7944396 and 7944405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58 + ... + 3986.

It is an arithmetic number, because the mean of its divisors is an integer number (996255).

Almost surely, 2^7944438 is an apocalyptic number.

7944438 is an abundant number, since it is smaller than the sum of its proper divisors (7995642).

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

7944438 is a wasteful number, since it uses less digits than its factorization.

7944438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271.

The product of its digits is 96768, while the sum is 39.

The square root of 7944438 is about 2818.5879443438. The cubic root of 7944438 is about 199.5359072559.

The spelling of 7944438 in words is "seven million, nine hundred forty-four thousand, four hundred thirty-eight".