800043644 has 6 divisors (see below), whose sum is σ = 1400076384. Its totient is φ = 400021820.

The previous prime is 800043641. The next prime is 800043653. The reversal of 800043644 is 446340008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800043641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005452 + ... + 100005459.

It is an arithmetic number, because the mean of its divisors is an integer number (233346064).

Almost surely, 2^800043644 is an apocalyptic number.

It is an amenable number.

800043644 is a deficient number, since it is larger than the sum of its proper divisors (600032740).

800043644 is a wasteful number, since it uses less digits than its factorization.

800043644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200010915 (or 200010913 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 800043644 is about 28285.0427611485. The cubic root of 800043644 is about 928.3346478742.

The spelling of 800043644 in words is "eight hundred million, forty-three thousand, six hundred forty-four".