804861780 has 48 divisors (see below), whose sum is σ = 2260911744. Its totient is φ = 213934720.

The previous prime is 804861779. The next prime is 804861781. The reversal of 804861780 is 87168408.

It is an interprime number because it is at equal distance from previous prime (804861779) and next prime (804861781).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804861781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2907 + ... + 40226.

It is an arithmetic number, because the mean of its divisors is an integer number (47102328).

Almost surely, 2^804861780 is an apocalyptic number.

It is an amenable number.

804861780 is an abundant number, since it is smaller than the sum of its proper divisors (1456049964).

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

804861780 is a wasteful number, since it uses less digits than its factorization.

804861780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43456 (or 43454 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 804861780 is about 28370.0860062144. The cubic root of 804861780 is about 930.1945020403.

The spelling of 804861780 in words is "eight hundred four million, eight hundred sixty-one thousand, seven hundred eighty".