805049280 has 784 divisors, whose sum is σ = 3597981120. Its totient is φ = 167215104.

The previous prime is 805049279. The next prime is 805049299. The reversal of 805049280 is 82940508.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 111 ways as a sum of consecutive naturals, for example, 27760306 + ... + 27760334.

Almost surely, 2^805049280 is an apocalyptic number.

805049280 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 805049280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798990560).

805049280 is an abundant number, since it is smaller than the sum of its proper divisors (2792931840).

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

805049280 is a wasteful number, since it uses less digits than its factorization.

805049280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 805049280 is about 28373.3903508199. The cubic root of 805049280 is about 930.2667289045.

Adding to 805049280 its reverse (82940508), we get a palindrome (887989788).

The spelling of 805049280 in words is "eight hundred five million, forty-nine thousand, two hundred eighty".