7881894 has 32 divisors (see below), whose sum is σ = 17619840. Its totient is φ = 2611656.

The previous prime is 7881889. The next prime is 7881901. The reversal of 7881894 is 4981887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11937 + ... + 12579.

It is an arithmetic number, because the mean of its divisors is an integer number (550620).

Almost surely, 2^7881894 is an apocalyptic number.

7881894 is an abundant number, since it is smaller than the sum of its proper divisors (9737946).

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

7881894 is a wasteful number, since it uses less digits than its factorization.

7881894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 875 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 7881894 is about 2807.4711040365. The cubic root of 7881894 is about 199.0108998011.

The spelling of 7881894 in words is "seven million, eight hundred eighty-one thousand, eight hundred ninety-four".