800561386 has 4 divisors (see below), whose sum is σ = 1200842082. Its totient is φ = 400280692.

The previous prime is 800561339. The next prime is 800561389. The reversal of 800561386 is 683165008.

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., 525830761 + 274730625 = 22931^2 + 16575^2 .

It is not an unprimeable number, because it can be changed into a prime (800561389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200140345 + ... + 200140348.

Almost surely, 2^800561386 is an apocalyptic number.

800561386 is a deficient number, since it is larger than the sum of its proper divisors (400280696).

800561386 is a wasteful number, since it uses less digits than its factorization.

800561386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400280695.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 800561386 is about 28294.1935032614. The cubic root of 800561386 is about 928.5348595325.

The spelling of 800561386 in words is "eight hundred million, five hundred sixty-one thousand, three hundred eighty-six".