800642190 has 32 divisors (see below), whose sum is σ = 2005088256. Its totient is φ = 204221600.

The previous prime is 800642189. The next prime is 800642191. The reversal of 800642190 is 91246008.

It is an interprime number because it is at equal distance from previous prime (800642189) and next prime (800642191).

It is a super-2 number, since 2×800642190² = 1282055832815992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800642191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579486 + ... + 580865.

It is an arithmetic number, because the mean of its divisors is an integer number (62659008).

Almost surely, 2^800642190 is an apocalyptic number.

800642190 is an abundant number, since it is smaller than the sum of its proper divisors (1204446066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

800642190 is a wasteful number, since it uses less digits than its factorization.

800642190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160384.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 800642190 is about 28295.6213927173. The cubic root of 800642190 is about 928.5660987803.

Adding to 800642190 its reverse (91246008), we get a palindrome (891888198).

The spelling of 800642190 in words is "eight hundred million, six hundred forty-two thousand, one hundred ninety".