33857828 has 12 divisors (see below), whose sum is σ = 61162752. Its totient is φ = 16382760.

The previous prime is 33857821. The next prime is 33857833. The reversal of 33857828 is 82875833.

It is a super-2 number, since 2×33857828² = 2292705033755168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33857821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136400 + ... + 136647.

It is an arithmetic number, because the mean of its divisors is an integer number (5096896).

Almost surely, 2^33857828 is an apocalyptic number.

It is an amenable number.

33857828 is a deficient number, since it is larger than the sum of its proper divisors (27304924).

33857828 is a wasteful number, since it uses less digits than its factorization.

33857828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273082 (or 273080 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 33857828 is about 5818.7479752950. The cubic root of 33857828 is about 323.5089982025.

The spelling of 33857828 in words is "thirty-three million, eight hundred fifty-seven thousand, eight hundred twenty-eight".