40000069 has 8 divisors (see below), whose sum is σ = 40364352. Its totient is φ = 39637920.

The previous prime is 40000061. The next prime is 40000123. The reversal of 40000069 is 96000004.

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 40000069 - 2³ = 40000061 is a prime.

It is a super-2 number, since 2×40000069² = 3200011040009522, 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 (40000061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79272 + ... + 79774.

It is an arithmetic number, because the mean of its divisors is an integer number (5045544).

Almost surely, 2^40000069 is an apocalyptic number.

It is an amenable number.

40000069 is a deficient number, since it is larger than the sum of its proper divisors (364283).

40000069 is a wasteful number, since it uses less digits than its factorization.

40000069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 40000069 is about 6324.5607752634. The cubic root of 40000069 is about 341.9953859825.

The spelling of 40000069 in words is "forty million, sixty-nine", and thus it is an aban number and an uban number.