40245218 has 8 divisors (see below), whose sum is σ = 65011548. Its totient is φ = 18574704.

The previous prime is 40245197. The next prime is 40245229. The reversal of 40245218 is 81254204.

It is a happy number.

40245218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39476089 + 769129 = 6283^2 + 877^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1547893 = 40245218 / (4 + 0 + 2 + 4 + 5 + 2 + 1 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773921 + ... + 773972.

Almost surely, 2^40245218 is an apocalyptic number.

40245218 is a deficient number, since it is larger than the sum of its proper divisors (24766330).

40245218 is a wasteful number, since it uses less digits than its factorization.

40245218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547908.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40245218 is about 6343.9118846340. The cubic root of 40245218 is about 342.6926275371.

The spelling of 40245218 in words is "forty million, two hundred forty-five thousand, two hundred eighteen".