836821284 has 24 divisors (see below), whose sum is σ = 2102782080. Its totient is φ = 257483424.

The previous prime is 836821273. The next prime is 836821327. The reversal of 836821284 is 482128638.

It is a happy number.

It is a super-2 number, since 2×836821284² = 1400539722710817312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2681964 + ... + 2682275.

It is an arithmetic number, because the mean of its divisors is an integer number (87615920).

Almost surely, 2^836821284 is an apocalyptic number.

It is an amenable number.

836821284 is an abundant number, since it is smaller than the sum of its proper divisors (1265960796).

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

836821284 is a wasteful number, since it uses less digits than its factorization.

836821284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364259 (or 5364257 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 836821284 is about 28927.8634537707. The cubic root of 836821284 is about 942.3471162733.

The spelling of 836821284 in words is "eight hundred thirty-six million, eight hundred twenty-one thousand, two hundred eighty-four".