7881944 has 24 divisors (see below), whose sum is σ = 17192340. Its totient is φ = 3377808.

The previous prime is 7881919. The next prime is 7881959. The reversal of 7881944 is 4491887.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9662 + ... + 10445.

Almost surely, 2^7881944 is an apocalyptic number.

It is an amenable number.

7881944 is an abundant number, since it is smaller than the sum of its proper divisors (9310396).

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

7881944 is a wasteful number, since it uses less digits than its factorization.

7881944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20127 (or 20116 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 7881944 is about 2807.4800088335. The cubic root of 7881944 is about 199.0113206189.

The spelling of 7881944 in words is "seven million, eight hundred eighty-one thousand, nine hundred forty-four".