40209043 has 16 divisors (see below), whose sum is σ = 46837440. Its totient is φ = 33808896.

The previous prime is 40209023. The next prime is 40209053. The reversal of 40209043 is 34090204.

It is a cyclic number.

It is not a de Polignac number, because 40209043 - 2⁵ = 40209011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40209023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145021 + ... + 145297.

It is an arithmetic number, because the mean of its divisors is an integer number (2927340).

Almost surely, 2^40209043 is an apocalyptic number.

40209043 is a deficient number, since it is larger than the sum of its proper divisors (6628397).

40209043 is a wasteful number, since it uses less digits than its factorization.

40209043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40209043 is about 6341.0600848754. The cubic root of 40209043 is about 342.5899186717.

Adding to 40209043 its reverse (34090204), we get a palindrome (74299247).

The spelling of 40209043 in words is "forty million, two hundred nine thousand, forty-three".