828700397 has 18 divisors (see below), whose sum is σ = 972209898. Its totient is φ = 704296992.

The previous prime is 828700363. The next prime is 828700399. The reversal of 828700397 is 793007828.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 753722116 + 74978281 = 27454^2 + 8659^2 .

It is not a de Polignac number, because 828700397 - 2¹⁰ = 828699373 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 (828700399) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2828183 + ... + 2828475.

It is an arithmetic number, because the mean of its divisors is an integer number (54011661).

Almost surely, 2^828700397 is an apocalyptic number.

It is an amenable number.

828700397 is a deficient number, since it is larger than the sum of its proper divisors (143509501).

828700397 is an equidigital number, since it uses as much as digits as its factorization.

828700397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 828700397 is about 28787.1568064649. The cubic root of 828700397 is about 939.2888831000.

The spelling of 828700397 in words is "eight hundred twenty-eight million, seven hundred thousand, three hundred ninety-seven".