40033409 has 16 divisors (see below), whose sum is σ = 45287424. Its totient is φ = 35112000.

The previous prime is 40033403. The next prime is 40033417. The reversal of 40033409 is 90433004.

It is a cyclic number.

It is not a de Polignac number, because 40033409 - 2⁸ = 40033153 is a prime.

It is a super-2 number, since 2×40033409² = 3205347672322562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (40033403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56759 + ... + 57459.

It is an arithmetic number, because the mean of its divisors is an integer number (2830464).

Almost surely, 2^40033409 is an apocalyptic number.

It is an amenable number.

40033409 is a deficient number, since it is larger than the sum of its proper divisors (5254015).

40033409 is a wasteful number, since it uses less digits than its factorization.

40033409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 40033409 is about 6327.1959824238. The cubic root of 40033409 is about 342.0903771498.

The spelling of 40033409 in words is "forty million, thirty-three thousand, four hundred nine".