828646638 has 16 divisors (see below), whose sum is σ = 1714441680. Its totient is φ = 266690816.

The previous prime is 828646619. The next prime is 828646703. The reversal of 828646638 is 836646828.

It is a happy number.

It is a congruent number.

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, 2380995 + ... + 2381342.

It is an arithmetic number, because the mean of its divisors is an integer number (107152605).

Almost surely, 2^828646638 is an apocalyptic number.

828646638 is an abundant number, since it is smaller than the sum of its proper divisors (885795042).

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

828646638 is a wasteful number, since it uses less digits than its factorization.

828646638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762371.

The product of its digits is 2654208, while the sum is 51.

The square root of 828646638 is about 28786.2230589565. The cubic root of 828646638 is about 939.2685716488.

The spelling of 828646638 in words is "eight hundred twenty-eight million, six hundred forty-six thousand, six hundred thirty-eight".