818235828 has 18 divisors (see below), whose sum is σ = 2068318434. Its totient is φ = 272745264.

The previous prime is 818235827. The next prime is 818235839. The reversal of 818235828 is 828532818.

It can be written as a sum of positive squares in only one way, i.e., 665020944 + 153214884 = 25788^2 + 12378^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818235827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11364351 + ... + 11364422.

Almost surely, 2^818235828 is an apocalyptic number.

It is an amenable number.

818235828 is an abundant number, since it is smaller than the sum of its proper divisors (1250082606).

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

818235828 is a wasteful number, since it uses less digits than its factorization.

818235828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22728783 (or 22728778 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 818235828 is about 28604.8217613744. The cubic root of 818235828 is about 935.3184414869.

The spelling of 818235828 in words is "eight hundred eighteen million, two hundred thirty-five thousand, eight hundred twenty-eight".