40056669 has 12 divisors (see below), whose sum is σ = 58067776. Its totient is φ = 26608392.

The previous prime is 40056659. The next prime is 40056671. The reversal of 40056669 is 96665004.

It is a happy number.

It is not a de Polignac number, because 40056669 - 2¹¹ = 40054621 is a prime.

It is a super-2 number, since 2×40056669² = 3209073462751122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40056629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5317 + ... + 10410.

Almost surely, 2^40056669 is an apocalyptic number.

It is an amenable number.

40056669 is a deficient number, since it is larger than the sum of its proper divisors (18011107).

40056669 is a wasteful number, since it uses less digits than its factorization.

40056669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16016 (or 16013 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 40056669 is about 6329.0338125183. The cubic root of 40056669 is about 342.1566175044.

The spelling of 40056669 in words is "forty million, fifty-six thousand, six hundred sixty-nine".