805628640 has 96 divisors (see below), whose sum is σ = 2687035680. Its totient is φ = 202194944.

The previous prime is 805628617. The next prime is 805628687. The reversal of 805628640 is 46826508.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41205 + ... + 57524.

It is an arithmetic number, because the mean of its divisors is an integer number (27989955).

Almost surely, 2^805628640 is an apocalyptic number.

805628640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

805628640 is an abundant number, since it is smaller than the sum of its proper divisors (1881407040).

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

805628640 is a wasteful number, since it uses less digits than its factorization.

805628640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98764 (or 98756 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 805628640 is about 28383.5980805817. The cubic root of 805628640 is about 930.4898332983.

The spelling of 805628640 in words is "eight hundred five million, six hundred twenty-eight thousand, six hundred forty".