800840444 has 6 divisors (see below), whose sum is σ = 1401470784. Its totient is φ = 400420220.

The previous prime is 800840431. The next prime is 800840449. The reversal of 800840444 is 444048008.

It is a happy number.

It is a super-2 number, since 2×800840444² = 1282690833492234272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 800840444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800840449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100105052 + ... + 100105059.

It is an arithmetic number, because the mean of its divisors is an integer number (233578464).

Almost surely, 2^800840444 is an apocalyptic number.

It is an amenable number.

800840444 is a deficient number, since it is larger than the sum of its proper divisors (600630340).

800840444 is a wasteful number, since it uses less digits than its factorization.

800840444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200210115 (or 200210113 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 800840444 is about 28299.1244387525. The cubic root of 800840444 is about 928.6427359069.

The spelling of 800840444 in words is "eight hundred million, eight hundred forty thousand, four hundred forty-four".