40449418 has 8 divisors (see below), whose sum is σ = 60774948. Its totient is φ = 20191104.

The previous prime is 40449413. The next prime is 40449421. The reversal of 40449418 is 81494404.

It can be written as a sum of positive squares in 2 ways, for example, as 26183689 + 14265729 = 5117^2 + 3777^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40449413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15271 + ... + 17722.

Almost surely, 2^40449418 is an apocalyptic number.

40449418 is a deficient number, since it is larger than the sum of its proper divisors (20325530).

40449418 is a wasteful number, since it uses less digits than its factorization.

40449418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33608.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 40449418 is about 6359.9856918078. The cubic root of 40449418 is about 343.2712454626.

The spelling of 40449418 in words is "forty million, four hundred forty-nine thousand, four hundred eighteen".