800404042 has 4 divisors (see below), whose sum is σ = 1200606066. Its totient is φ = 400202020.

The previous prime is 800404037. The next prime is 800404057. The reversal of 800404042 is 240404008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 782264961 + 18139081 = 27969^2 + 4259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200101009 + ... + 200101012.

Almost surely, 2^800404042 is an apocalyptic number.

800404042 is a deficient number, since it is larger than the sum of its proper divisors (400202024).

800404042 is a wasteful number, since it uses less digits than its factorization.

800404042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400202023.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 800404042 is about 28291.4128668047. The cubic root of 800404042 is about 928.4740234892.

The spelling of 800404042 in words is "eight hundred million, four hundred four thousand, forty-two".