33684972 has 72 divisors (see below), whose sum is σ = 85413888. Its totient is φ = 10311840.

The previous prime is 33684971. The next prime is 33685019. The reversal of 33684972 is 27948633.

It is a super-2 number, since 2×33684972² = 2269354677281568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33684971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265173 + ... + 265299.

It is an arithmetic number, because the mean of its divisors is an integer number (1186304).

Almost surely, 2^33684972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33684972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42706944).

33684972 is an abundant number, since it is smaller than the sum of its proper divisors (51728916).

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

33684972 is a wasteful number, since it uses less digits than its factorization.

33684972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 186 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 33684972 is about 5803.8756016993. The cubic root of 33684972 is about 322.9575166099.

The spelling of 33684972 in words is "thirty-three million, six hundred eighty-four thousand, nine hundred seventy-two".