805397040 has 160 divisors (see below), whose sum is σ = 3170511360. Its totient is φ = 184087296.

The previous prime is 805397027. The next prime is 805397053. The reversal of 805397040 is 40793508.

805397040 is a `hidden beast` number, since 80 + 539 + 7 + 0 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (805397027) and next prime (805397053).

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

It is a junction number, because it is equal to n+sod(n) for n = 805396986 and 805397004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11514 + ... + 41753.

It is an arithmetic number, because the mean of its divisors is an integer number (19815696).

Almost surely, 2^805397040 is an apocalyptic number.

805397040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805397040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585255680).

805397040 is an abundant number, since it is smaller than the sum of its proper divisors (2365114320).

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

805397040 is a wasteful number, since it uses less digits than its factorization.

805397040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53296 (or 53284 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 805397040 is about 28379.5179663080. The cubic root of 805397040 is about 930.4006598303.

The spelling of 805397040 in words is "eight hundred five million, three hundred ninety-seven thousand, forty".