40415869 has 8 divisors (see below), whose sum is σ = 45815840. Its totient is φ = 35343216.

The previous prime is 40415867. The next prime is 40415891. The reversal of 40415869 is 96851404.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40415869 - 2¹ = 40415867 is a prime.

It is a super-2 number, since 2×40415869² = 3266884934050322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40415863) 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, 81567 + ... + 82060.

It is an arithmetic number, because the mean of its divisors is an integer number (5726980).

Almost surely, 2^40415869 is an apocalyptic number.

It is an amenable number.

40415869 is a deficient number, since it is larger than the sum of its proper divisors (5399971).

40415869 is a wasteful number, since it uses less digits than its factorization.

40415869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163659.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40415869 is about 6357.3476387563. The cubic root of 40415869 is about 343.1763154407.

The spelling of 40415869 in words is "forty million, four hundred fifteen thousand, eight hundred sixty-nine".