840440044 has 12 divisors (see below), whose sum is σ = 1471239000. Its totient is φ = 420086048.

The previous prime is 840440011. The next prime is 840440071. The reversal of 840440044 is 440044048.

It is a junction number, because it is equal to n+sod(n) for n = 840439994 and 840440021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18649 + ... + 45040.

It is an arithmetic number, because the mean of its divisors is an integer number (122603250).

Almost surely, 2^840440044 is an apocalyptic number.

It is an amenable number.

840440044 is a deficient number, since it is larger than the sum of its proper divisors (630798956).

840440044 is a wasteful number, since it uses less digits than its factorization.

840440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66992 (or 66990 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 840440044 is about 28990.3439786423. The cubic root of 840440044 is about 943.7035286446.

The spelling of 840440044 in words is "eight hundred forty million, four hundred forty thousand, forty-four".