40207669 has 8 divisors (see below), whose sum is σ = 42628248. Its totient is φ = 37793280.

The previous prime is 40207663. The next prime is 40207681. The reversal of 40207669 is 96670204.

It can be written as a sum of positive squares in 4 ways, for example, as 4566769 + 35640900 = 2137^2 + 5970^2 .

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 40207669 - 2⁵ = 40207637 is a prime.

It is a super-2 number, since 2×40207669² = 3233313292827122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40207663) 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, 24379 + ... + 25975.

It is an arithmetic number, because the mean of its divisors is an integer number (5328531).

Almost surely, 2^40207669 is an apocalyptic number.

It is an amenable number.

40207669 is a deficient number, since it is larger than the sum of its proper divisors (2420579).

40207669 is a wasteful number, since it uses less digits than its factorization.

40207669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 40207669 is about 6340.9517424437. The cubic root of 40207669 is about 342.5860163662.

The spelling of 40207669 in words is "forty million, two hundred seven thousand, six hundred sixty-nine".