805451670 has 144 divisors (see below), whose sum is σ = 2249966160. Its totient is φ = 199861248.

The previous prime is 805451663. The next prime is 805451701. The reversal of 805451670 is 76154508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4499641 + ... + 4499819.

It is an arithmetic number, because the mean of its divisors is an integer number (15624765).

Almost surely, 2^805451670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805451670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124983080).

805451670 is an abundant number, since it is smaller than the sum of its proper divisors (1444514490).

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

805451670 is a wasteful number, since it uses less digits than its factorization.

805451670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 805451670 is about 28380.4804399080. The cubic root of 805451670 is about 930.4216956823.

It can be divided in two parts, 80545 and 1670, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 805451670 in words is "eight hundred five million, four hundred fifty-one thousand, six hundred seventy".