828764399 has 8 divisors (see below), whose sum is σ = 877891248. Its totient is φ = 779679360.

The previous prime is 828764393. The next prime is 828764423. The reversal of 828764399 is 993467828.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 828764399 - 2⁴ = 828764383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828764393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36404 + ... + 54614.

It is an arithmetic number, because the mean of its divisors is an integer number (109736406).

Almost surely, 2^828764399 is an apocalyptic number.

828764399 is a deficient number, since it is larger than the sum of its proper divisors (49126849).

828764399 is a wasteful number, since it uses less digits than its factorization.

828764399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20905.

The product of its digits is 5225472, while the sum is 56.

The square root of 828764399 is about 28788.2684265657. The cubic root of 828764399 is about 939.3130634591.

The spelling of 828764399 in words is "eight hundred twenty-eight million, seven hundred sixty-four thousand, three hundred ninety-nine".