40243619 has 8 divisors (see below), whose sum is σ = 44834160. Its totient is φ = 35866656.

The previous prime is 40243601. The next prime is 40243631. The reversal of 40243619 is 91634204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40243619 is a prime.

It is a super-2 number, since 2×40243619² = 3239097740434322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40243591 and 40243600.

It is not an unprimeable number, because it can be changed into a prime (40243669) 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, 52997 + ... + 53750.

It is an arithmetic number, because the mean of its divisors is an integer number (5604270).

Almost surely, 2^40243619 is an apocalyptic number.

40243619 is a deficient number, since it is larger than the sum of its proper divisors (4590541).

40243619 is a wasteful number, since it uses less digits than its factorization.

40243619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106789.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 40243619 is about 6343.7858570415. The cubic root of 40243619 is about 342.6880889212.

The spelling of 40243619 in words is "forty million, two hundred forty-three thousand, six hundred nineteen".