40409169 has 8 divisors (see below), whose sum is σ = 53945472. Its totient is φ = 26906160.

The previous prime is 40409147. The next prime is 40409179. The reversal of 40409169 is 96190404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40409169 - 2¹³ = 40400977 is a prime.

It is a super-2 number, since 2×40409169² = 3265801878541122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40409129) 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, 5337 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (6743184).

Almost surely, 2^40409169 is an apocalyptic number.

It is an amenable number.

40409169 is a deficient number, since it is larger than the sum of its proper divisors (13536303).

40409169 is a wasteful number, since it uses less digits than its factorization.

40409169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16647.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 40409169 is about 6356.8206675979. The cubic root of 40409169 is about 343.1573508736.

The spelling of 40409169 in words is "forty million, four hundred nine thousand, one hundred sixty-nine".