33989956 has 72 divisors (see below), whose sum is σ = 80426304. Its totient is φ = 12205440.

The previous prime is 33989951. The next prime is 33989957. The reversal of 33989956 is 65998933.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (33989951) 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, 51726 + ... + 52378.

It is an arithmetic number, because the mean of its divisors is an integer number (1117032).

Almost surely, 2^33989956 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 33989956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40213152).

33989956 is an abundant number, since it is smaller than the sum of its proper divisors (46436348).

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

33989956 is a wasteful number, since it uses less digits than its factorization.

33989956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 686 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 52.

The square root of 33989956 is about 5830.0905653343. The cubic root of 33989956 is about 323.9292763380.

It can be divided in two parts, 33 and 989956, that added together give a palindrome (989989).

The spelling of 33989956 in words is "thirty-three million, nine hundred eighty-nine thousand, nine hundred fifty-six".