828745231 has 4 divisors (see below), whose sum is σ = 835270912. Its totient is φ = 822219552.

The previous prime is 828745217. The next prime is 828745237. The reversal of 828745231 is 132547828.

It is a happy number.

828745231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828745231 is a prime.

It is a super-2 number, since 2×828745231² = 1373637315810486722, 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 (828745237) 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, 3262650 + ... + 3262903.

It is an arithmetic number, because the mean of its divisors is an integer number (208817728).

Almost surely, 2^828745231 is an apocalyptic number.

828745231 is a deficient number, since it is larger than the sum of its proper divisors (6525681).

828745231 is a wasteful number, since it uses less digits than its factorization.

828745231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6525680.

The product of its digits is 107520, while the sum is 40.

The square root of 828745231 is about 28787.9355112519. The cubic root of 828745231 is about 939.3058217985.

The spelling of 828745231 in words is "eight hundred twenty-eight million, seven hundred forty-five thousand, two hundred thirty-one".