828778824 has 64 divisors (see below), whose sum is σ = 2351174400. Its totient is φ = 270378432.

The previous prime is 828778823. The next prime is 828778913. The reversal of 828778824 is 428877828.

It is a super-2 number, since 2×828778824² = 1373748678221645952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (828778823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30667 + ... + 50970.

It is an arithmetic number, because the mean of its divisors is an integer number (36737100).

Almost surely, 2^828778824 is an apocalyptic number.

It is an amenable number.

828778824 is an abundant number, since it is smaller than the sum of its proper divisors (1522395576).

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

828778824 is a wasteful number, since it uses less digits than its factorization.

828778824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81699 (or 81689 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 54.

The square root of 828778824 is about 28788.5189615583. The cubic root of 828778824 is about 939.3185131432.

The spelling of 828778824 in words is "eight hundred twenty-eight million, seven hundred seventy-eight thousand, eight hundred twenty-four".