833778864 has 60 divisors (see below), whose sum is σ = 2341958736. Its totient is φ = 276909696.

The previous prime is 833778857. The next prime is 833778893. The reversal of 833778864 is 468877338.

It is a self number, because there is not a number n which added to its sum of digits gives 833778864.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29437 + ... + 50339.

Almost surely, 2^833778864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 833778864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170979368).

833778864 is an abundant number, since it is smaller than the sum of its proper divisors (1508179872).

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

833778864 is a wasteful number, since it uses less digits than its factorization.

833778864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21194 (or 21185 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 833778864 is about 28875.2292458432. The cubic root of 833778864 is about 941.2037031667.

The spelling of 833778864 in words is "eight hundred thirty-three million, seven hundred seventy-eight thousand, eight hundred sixty-four".