33640442 has 16 divisors (see below), whose sum is σ = 55302912. Its totient is φ = 15220320.

The previous prime is 33640441. The next prime is 33640447. The reversal of 33640442 is 24404633.

33640442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33640442² = 2263358675910728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33640441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478 + ... + 8334.

It is an arithmetic number, because the mean of its divisors is an integer number (3456432).

Almost surely, 2^33640442 is an apocalyptic number.

33640442 is a deficient number, since it is larger than the sum of its proper divisors (21662470).

33640442 is a wasteful number, since it uses less digits than its factorization.

33640442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 33640442 is about 5800.0381033231. The cubic root of 33640442 is about 322.8151421408.

The spelling of 33640442 in words is "thirty-three million, six hundred forty thousand, four hundred forty-two".