40040205 has 16 divisors (see below), whose sum is σ = 65022144. Its totient is φ = 21035520.

The previous prime is 40040197. The next prime is 40040227. The reversal of 40040205 is 50204004.

It is not a de Polignac number, because 40040205 - 2³ = 40040197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18916 + ... + 20925.

It is an arithmetic number, because the mean of its divisors is an integer number (4063884).

Almost surely, 2^40040205 is an apocalyptic number.

It is an amenable number.

40040205 is a deficient number, since it is larger than the sum of its proper divisors (24981939).

40040205 is a wasteful number, since it uses less digits than its factorization.

40040205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39916.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40040205 is about 6327.7330063776. The cubic root of 40040205 is about 342.1097336050.

Adding to 40040205 its reverse (50204004), we get a palindrome (90244209).

The spelling of 40040205 in words is "forty million, forty thousand, two hundred five".