800891064 has 112 divisors (see below), whose sum is σ = 2278249200. Its totient is φ = 263793024.

The previous prime is 800891017. The next prime is 800891081. The reversal of 800891064 is 460198008.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 518277 + ... + 519819.

Almost surely, 2^800891064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 800891064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139124600).

800891064 is an abundant number, since it is smaller than the sum of its proper divisors (1477358136).

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

800891064 is a wasteful number, since it uses less digits than its factorization.

800891064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 800891064 is about 28300.0187985803. The cubic root of 800891064 is about 928.6623015625.

The spelling of 800891064 in words is "eight hundred million, eight hundred ninety-one thousand, sixty-four".