40439019 has 16 divisors (see below), whose sum is σ = 54812160. Its totient is φ = 26516160.

The previous prime is 40438999. The next prime is 40439023. The reversal of 40439019 is 91093404.

40439019 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 40439019 - 2⁵ = 40438987 is a prime.

It is a super-2 number, since 2×40439019² = 3270628515364722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40439029) 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, 82794 + ... + 83280.

It is an arithmetic number, because the mean of its divisors is an integer number (3425760).

Almost surely, 2^40439019 is an apocalyptic number.

40439019 is a deficient number, since it is larger than the sum of its proper divisors (14373141).

40439019 is a wasteful number, since it uses less digits than its factorization.

40439019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40439019 is about 6359.1681059711. The cubic root of 40439019 is about 343.2418261384.

The spelling of 40439019 in words is "forty million, four hundred thirty-nine thousand, nineteen".