40304169 has 8 divisors (see below), whose sum is σ = 59709920. Its totient is φ = 26869428.

The previous prime is 40304129. The next prime is 40304183. The reversal of 40304169 is 96140304.

It is not a de Polignac number, because 40304169 - 2⁷ = 40304041 is a prime.

It is a super-2 number, since 2×40304169² = 3248852077561122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1492747 = 40304169 / (4 + 0 + 3 + 0 + 4 + 1 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40304129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746347 + ... + 746400.

It is an arithmetic number, because the mean of its divisors is an integer number (7463740).

Almost surely, 2^40304169 is an apocalyptic number.

It is an amenable number.

40304169 is a deficient number, since it is larger than the sum of its proper divisors (19405751).

40304169 is a wasteful number, since it uses less digits than its factorization.

40304169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492756 (or 1492750 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 40304169 is about 6348.5564500916. The cubic root of 40304169 is about 342.8598707372.

The spelling of 40304169 in words is "forty million, three hundred four thousand, one hundred sixty-nine".