33886428 has 12 divisors (see below), whose sum is σ = 79068360. Its totient is φ = 11295472.

The previous prime is 33886421. The next prime is 33886453. The reversal of 33886428 is 82468833.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33886428² = 2296580005198368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33886428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33886421) 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, 1411923 + ... + 1411946.

It is an arithmetic number, because the mean of its divisors is an integer number (6589030).

Almost surely, 2^33886428 is an apocalyptic number.

It is an amenable number.

33886428 is an abundant number, since it is smaller than the sum of its proper divisors (45181932).

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

33886428 is a wasteful number, since it uses less digits than its factorization.

33886428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823876 (or 2823874 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 33886428 is about 5821.2050298886. The cubic root of 33886428 is about 323.6000628488.

The spelling of 33886428 in words is "thirty-three million, eight hundred eighty-six thousand, four hundred twenty-eight".