33640068 has 96 divisors (see below), whose sum is σ = 99993600. Its totient is φ = 8725920.

The previous prime is 33640063. The next prime is 33640069. The reversal of 33640068 is 86004633.

It is a super-2 number, since 2×33640068² = 2263308350089248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33640063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44905 + ... + 45647.

It is an arithmetic number, because the mean of its divisors is an integer number (1041600).

Almost surely, 2^33640068 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 33640068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49996800).

33640068 is an abundant number, since it is smaller than the sum of its proper divisors (66353532).

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

33640068 is a wasteful number, since it uses less digits than its factorization.

33640068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 33640068 is about 5800.0058620660. The cubic root of 33640068 is about 322.8139458297.

It can be divided in two parts, 336 and 40068, that added together give a palindrome (40404).

The spelling of 33640068 in words is "thirty-three million, six hundred forty thousand, sixty-eight".