33668472 has 32 divisors (see below), whose sum is σ = 84419280. Its totient is φ = 11189760.

The previous prime is 33668461. The next prime is 33668473. The reversal of 33668472 is 27486633.

It is a super-2 number, since 2×33668472² = 2267132013629568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 33668472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33668473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 10832.

Almost surely, 2^33668472 is an apocalyptic number.

It is an amenable number.

33668472 is an abundant number, since it is smaller than the sum of its proper divisors (50750808).

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

33668472 is a wasteful number, since it uses less digits than its factorization.

33668472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143 (or 4139 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 33668472 is about 5802.4539636261. The cubic root of 33668472 is about 322.9047762827.

The spelling of 33668472 in words is "thirty-three million, six hundred sixty-eight thousand, four hundred seventy-two".