33712428 has 36 divisors (see below), whose sum is σ = 83570312. Its totient is φ = 10575360.

The previous prime is 33712397. The next prime is 33712477. The reversal of 33712428 is 82421733.

It is a super-2 number, since 2×33712428² = 2273055603310368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33712395 and 33712404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1393 + ... + 8328.

Almost surely, 2^33712428 is an apocalyptic number.

It is an amenable number.

33712428 is an abundant number, since it is smaller than the sum of its proper divisors (49857884).

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

33712428 is a wasteful number, since it uses less digits than its factorization.

33712428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762 (or 9743 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 33712428 is about 5806.2404359448. The cubic root of 33712428 is about 323.0452383544.

The spelling of 33712428 in words is "thirty-three million, seven hundred twelve thousand, four hundred twenty-eight".