40172019 has 16 divisors (see below), whose sum is σ = 55440000. Its totient is φ = 25857216.

The previous prime is 40171997. The next prime is 40172021. The reversal of 40172019 is 91027104.

It is not a de Polignac number, because 40172019 - 2⁵ = 40171987 is a prime.

It is a super-2 number, since 2×40172019² = 3227582221072722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40172019.

It is not an unprimeable number, because it can be changed into a prime (40172089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9732 + ... + 13230.

It is an arithmetic number, because the mean of its divisors is an integer number (3465000).

Almost surely, 2^40172019 is an apocalyptic number.

40172019 is a deficient number, since it is larger than the sum of its proper divisors (15267981).

40172019 is a wasteful number, since it uses less digits than its factorization.

40172019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 40172019 is about 6338.1400268533. The cubic root of 40172019 is about 342.4847354982.

The spelling of 40172019 in words is "forty million, one hundred seventy-two thousand, nineteen".