40000019 has 8 divisors (see below), whose sum is σ = 42342960. Its totient is φ = 37721376.

The previous prime is 40000003. The next prime is 40000021. The reversal of 40000019 is 91000004.

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 40000019 - 2⁴ = 40000003 is a prime.

It is a super-2 number, since 2×40000019² = 3200003040000722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39999958 and 40000012.

It is not an unprimeable number, because it can be changed into a prime (40060019) 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, 14792 + ... + 17285.

It is an arithmetic number, because the mean of its divisors is an integer number (5292870).

Almost surely, 2^40000019 is an apocalyptic number.

40000019 is a deficient number, since it is larger than the sum of its proper divisors (2342941).

40000019 is a wasteful number, since it uses less digits than its factorization.

40000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32149.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 40000019 is about 6324.5568224185. The cubic root of 40000019 is about 341.9952434846.

The spelling of 40000019 in words is "forty million, nineteen", and thus it is an aban number and an uban number.