33811428 has 24 divisors (see below), whose sum is σ = 90164032. Its totient is φ = 9660384.

The previous prime is 33811409. The next prime is 33811433. The reversal of 33811428 is 82411833.

33811428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33811428² = 2286425326798368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33811395 and 33811404.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 201175 + ... + 201342.

Almost surely, 2^33811428 is an apocalyptic number.

It is an amenable number.

33811428 is an abundant number, since it is smaller than the sum of its proper divisors (56352604).

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

33811428 is a wasteful number, since it uses less digits than its factorization.

33811428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402531 (or 402529 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 33811428 is about 5814.7594963162. The cubic root of 33811428 is about 323.3611478062.

The spelling of 33811428 in words is "thirty-three million, eight hundred eleven thousand, four hundred twenty-eight".