33406642 has 16 divisors (see below), whose sum is σ = 51525720. Its totient is φ = 16237312.

The previous prime is 33406631. The next prime is 33406643. The reversal of 33406642 is 24660433.

It can be written as a sum of positive squares in 4 ways, for example, as 24591681 + 8814961 = 4959^2 + 2969^2 .

It is a super-2 number, since 2×33406642² = 2232007459432328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33406642.

It is not an unprimeable number, because it can be changed into a prime (33406643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10584 + ... + 13372.

Almost surely, 2^33406642 is an apocalyptic number.

33406642 is a deficient number, since it is larger than the sum of its proper divisors (18119078).

33406642 is a wasteful number, since it uses less digits than its factorization.

33406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 33406642 is about 5779.8479218748. The cubic root of 33406642 is about 322.0655512546.

The spelling of 33406642 in words is "thirty-three million, four hundred six thousand, six hundred forty-two".