40474209 has 4 divisors (see below), whose sum is σ = 53965616. Its totient is φ = 26982804.

The previous prime is 40474201. The next prime is 40474219. The reversal of 40474209 is 90247404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40474209 - 2³ = 40474201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40474201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6745699 + ... + 6745704.

It is an arithmetic number, because the mean of its divisors is an integer number (13491404).

Almost surely, 2^40474209 is an apocalyptic number.

It is an amenable number.

40474209 is a deficient number, since it is larger than the sum of its proper divisors (13491407).

40474209 is a wasteful number, since it uses less digits than its factorization.

40474209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13491406.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40474209 is about 6361.9343756439. The cubic root of 40474209 is about 343.3413601877.

It can be divided in two parts, 4047 and 4209, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 40474209 in words is "forty million, four hundred seventy-four thousand, two hundred nine".