33140406 has 32 divisors (see below), whose sum is σ = 72253440. Its totient is φ = 10072224.

The previous prime is 33140383. The next prime is 33140413. The reversal of 33140406 is 60404133.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3915 + ... + 9033.

It is an arithmetic number, because the mean of its divisors is an integer number (2257920).

Almost surely, 2^33140406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33140406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36126720).

33140406 is an abundant number, since it is smaller than the sum of its proper divisors (39113034).

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

33140406 is a wasteful number, since it uses less digits than its factorization.

33140406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 33140406 is about 5756.7704487846. The cubic root of 33140406 is about 321.2076954795.

Adding to 33140406 its reverse (60404133), we get a palindrome (93544539).

The spelling of 33140406 in words is "thirty-three million, one hundred forty thousand, four hundred six".