40869438 has 16 divisors (see below), whose sum is σ = 82192656. Its totient is φ = 13547520.

The previous prime is 40869431. The next prime is 40869457. The reversal of 40869438 is 83496804.

It is a self number, because there is not a number n which added to its sum of digits gives 40869438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40869431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17731 + ... + 19902.

It is an arithmetic number, because the mean of its divisors is an integer number (5137041).

Almost surely, 2^40869438 is an apocalyptic number.

40869438 is an abundant number, since it is smaller than the sum of its proper divisors (41323218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40869438 is a wasteful number, since it uses less digits than its factorization.

40869438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37819.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 40869438 is about 6392.9209286523. The cubic root of 40869438 is about 344.4553135738.

The spelling of 40869438 in words is "forty million, eight hundred sixty-nine thousand, four hundred thirty-eight".