8440894891 has 16 divisors (see below), whose sum is σ = 9923850720. Its totient is φ = 7078072320.

The previous prime is 8440894877. The next prime is 8440894901. The reversal of 8440894891 is 1984980448.

It is a de Polignac number, because none of the positive numbers 2^k-8440894891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440891891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180541 + ... + 222433.

It is an arithmetic number, because the mean of its divisors is an integer number (620240670).

Almost surely, 2^8440894891 is an apocalyptic number.

8440894891 is a deficient number, since it is larger than the sum of its proper divisors (1482955829).

8440894891 is a wasteful number, since it uses less digits than its factorization.

8440894891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43326.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The square root of 8440894891 is about 91874.3429418682. The cubic root of 8440894891 is about 2036.0862173731.

The spelling of 8440894891 in words is "eight billion, four hundred forty million, eight hundred ninety-four thousand, eight hundred ninety-one".