40439469 has 16 divisors (see below), whose sum is σ = 63610880. Its totient is φ = 22362480.

The previous prime is 40439453. The next prime is 40439471. The reversal of 40439469 is 96493404.

40439469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40439469 - 2⁴ = 40439453 is a prime.

It is a super-2 number, since 2×40439469² = 3270701306003922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40439419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30409 + ... + 31710.

It is an arithmetic number, because the mean of its divisors is an integer number (3975680).

Almost surely, 2^40439469 is an apocalyptic number.

It is an amenable number.

40439469 is a deficient number, since it is larger than the sum of its proper divisors (23171411).

40439469 is a wasteful number, since it uses less digits than its factorization.

40439469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62160.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 40439469 is about 6359.2034878592. The cubic root of 40439469 is about 343.2430993167.

The spelling of 40439469 in words is "forty million, four hundred thirty-nine thousand, four hundred sixty-nine".