40405869 has 24 divisors (see below), whose sum is σ = 68332992. Its totient is φ = 22524480.

The previous prime is 40405861. The next prime is 40405877. The reversal of 40405869 is 96850404.

40405869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40405861) and next prime (40405877).

It is not a de Polignac number, because 40405869 - 2³ = 40405861 is a prime.

It is a super-2 number, since 2×40405869² = 3265268499290322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40405861) 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 23 ways as a sum of consecutive naturals, for example, 5239 + ... + 10404.

It is an arithmetic number, because the mean of its divisors is an integer number (2847208).

Almost surely, 2^40405869 is an apocalyptic number.

It is an amenable number.

40405869 is a deficient number, since it is larger than the sum of its proper divisors (27927123).

40405869 is a wasteful number, since it uses less digits than its factorization.

40405869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15697 (or 15694 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 40405869 is about 6356.5610985815. The cubic root of 40405869 is about 343.1480093461.

The spelling of 40405869 in words is "forty million, four hundred five thousand, eight hundred sixty-nine".