40342019 has 4 divisors (see below), whose sum is σ = 40373880. Its totient is φ = 40310160.

The previous prime is 40342013. The next prime is 40342021. The reversal of 40342019 is 91024304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40342019 - 2²⁴ = 23564803 is a prime.

It is a super-2 number, since 2×40342019² = 3254956993992722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40341985 and 40342003.

It is not an unprimeable number, because it can be changed into a prime (40342013) 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, 13949 + ... + 16590.

It is an arithmetic number, because the mean of its divisors is an integer number (10093470).

Almost surely, 2^40342019 is an apocalyptic number.

40342019 is a deficient number, since it is larger than the sum of its proper divisors (31861).

40342019 is a wasteful number, since it uses less digits than its factorization.

40342019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31860.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40342019 is about 6351.5367431827. The cubic root of 40342019 is about 342.9671647319.

The spelling of 40342019 in words is "forty million, three hundred forty-two thousand, nineteen".