800440157 has 4 divisors (see below), whose sum is σ = 873207456. Its totient is φ = 727672860.

The previous prime is 800440117. The next prime is 800440159. The reversal of 800440157 is 751044008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 800440157 - 2¹² = 800436061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800440159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36383633 + ... + 36383654.

It is an arithmetic number, because the mean of its divisors is an integer number (218301864).

Almost surely, 2^800440157 is an apocalyptic number.

It is an amenable number.

800440157 is a deficient number, since it is larger than the sum of its proper divisors (72767299).

800440157 is a wasteful number, since it uses less digits than its factorization.

800440157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72767298.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 800440157 is about 28292.0511274810. The cubic root of 800440157 is about 928.4879878261.

The spelling of 800440157 in words is "eight hundred million, four hundred forty thousand, one hundred fifty-seven".