40394969 has 12 divisors (see below), whose sum is σ = 44461200. Its totient is φ = 36595944.

The previous prime is 40394947. The next prime is 40394983. The reversal of 40394969 is 96949304.

It is a happy number.

It is not a de Polignac number, because 40394969 - 2¹⁶ = 40329433 is a prime.

It is a super-2 number, since 2×40394969² = 3263507041021922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40399969) 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 11 ways as a sum of consecutive naturals, for example, 8042 + ... + 12060.

It is an arithmetic number, because the mean of its divisors is an integer number (3705100).

Almost surely, 2^40394969 is an apocalyptic number.

It is an amenable number.

40394969 is a deficient number, since it is larger than the sum of its proper divisors (4066231).

40394969 is a wasteful number, since it uses less digits than its factorization.

40394969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 40394969 is about 6355.7036589193. The cubic root of 40394969 is about 343.1171503829.

The spelling of 40394969 in words is "forty million, three hundred ninety-four thousand, nine hundred sixty-nine".