33681672 has 48 divisors (see below), whose sum is σ = 91943280. Its totient is φ = 11138400.

The previous prime is 33681671. The next prime is 33681677. The reversal of 33681672 is 27618633.

It is a happy number.

It is a super-2 number, since 2×33681672² = 2268910057431168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (33681671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7647 + ... + 11217.

It is an arithmetic number, because the mean of its divisors is an integer number (1915485).

Almost surely, 2^33681672 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 33681672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45971640).

33681672 is an abundant number, since it is smaller than the sum of its proper divisors (58261608).

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

33681672 is a wasteful number, since it uses less digits than its factorization.

33681672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714 (or 3707 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 33681672 is about 5803.5913019440. The cubic root of 33681672 is about 322.9469699225.

The spelling of 33681672 in words is "thirty-three million, six hundred eighty-one thousand, six hundred seventy-two".