33228732 has 12 divisors (see below), whose sum is σ = 77533736. Its totient is φ = 11076240.

The previous prime is 33228731. The next prime is 33228733. The reversal of 33228732 is 23782233.

It is an interprime number because it is at equal distance from previous prime (33228731) and next prime (33228733).

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

It is a super-2 number, since 2×33228732² = 2208297260655648, 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 33228732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33228731) 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, 1384519 + ... + 1384542.

Almost surely, 2^33228732 is an apocalyptic number.

It is an amenable number.

33228732 is an abundant number, since it is smaller than the sum of its proper divisors (44305004).

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

33228732 is a wasteful number, since it uses less digits than its factorization.

33228732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769068 (or 2769066 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 33228732 is about 5764.4368328571. The cubic root of 33228732 is about 321.4928038688.

The spelling of 33228732 in words is "thirty-three million, two hundred twenty-eight thousand, seven hundred thirty-two".