805139244 has 384 divisors, whose sum is σ = 2799820800. Its totient is φ = 194088960.

The previous prime is 805139213. The next prime is 805139249. The reversal of 805139244 is 442931508.

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 = 805139199 and 805139208.

It is not an unprimeable number, because it can be changed into a prime (805139249) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10191597 + ... + 10191675.

It is an arithmetic number, because the mean of its divisors is an integer number (7291200).

Almost surely, 2^805139244 is an apocalyptic number.

805139244 is a gapful number since it is divisible by the number (84) 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 805139244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399910400).

805139244 is an abundant number, since it is smaller than the sum of its proper divisors (1994681556).

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

805139244 is a wasteful number, since it uses less digits than its factorization.

805139244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 805139244 is about 28374.9756651878. The cubic root of 805139244 is about 930.3013799504.

The spelling of 805139244 in words is "eight hundred five million, one hundred thirty-nine thousand, two hundred forty-four".