828324509 has 4 divisors (see below), whose sum is σ = 833284704. Its totient is φ = 823364316.

The previous prime is 828324493. The next prime is 828324529. The reversal of 828324509 is 905423828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 828324509 - 2⁴ = 828324493 is a prime.

It is a super-2 number, since 2×828324509² = 1372242984420182162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828324529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2479847 + ... + 2480180.

It is an arithmetic number, because the mean of its divisors is an integer number (208321176).

Almost surely, 2^828324509 is an apocalyptic number.

It is an amenable number.

828324509 is a deficient number, since it is larger than the sum of its proper divisors (4960195).

828324509 is a wasteful number, since it uses less digits than its factorization.

828324509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960194.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 828324509 is about 28780.6273211687. The cubic root of 828324509 is about 939.1468451103.

The spelling of 828324509 in words is "eight hundred twenty-eight million, three hundred twenty-four thousand, five hundred nine".