40016069 has 4 divisors (see below), whose sum is σ = 40029696. Its totient is φ = 40002444.

The previous prime is 40016051. The next prime is 40016077. The reversal of 40016069 is 96061004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40016069 is a prime.

It is a super-2 number, since 2×40016069² = 3202571556425522, 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 (40016569) 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 3 ways as a sum of consecutive naturals, for example, 389 + ... + 8954.

It is an arithmetic number, because the mean of its divisors is an integer number (10007424).

Almost surely, 2^40016069 is an apocalyptic number.

It is an amenable number.

40016069 is a deficient number, since it is larger than the sum of its proper divisors (13627).

40016069 is an equidigital number, since it uses as much as digits as its factorization.

40016069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13626.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 40016069 is about 6325.8255587710. The cubic root of 40016069 is about 342.0409792101.

The spelling of 40016069 in words is "forty million, sixteen thousand, sixty-nine".