40649418 has 48 divisors (see below), whose sum is σ = 94496640. Its totient is φ = 12951576.

The previous prime is 40649383. The next prime is 40649419. The reversal of 40649418 is 81494604.

It is a happy number.

40649418 is a `hidden beast` number, since 4 + 0 + 649 + 4 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (40649419) 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 23 ways as a sum of consecutive naturals, for example, 27855 + ... + 29277.

It is an arithmetic number, because the mean of its divisors is an integer number (1968680).

Almost surely, 2^40649418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40649418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47248320).

40649418 is an abundant number, since it is smaller than the sum of its proper divisors (53847222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40649418 is a wasteful number, since it uses less digits than its factorization.

40649418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 40649418 is about 6375.6896097599. The cubic root of 40649418 is about 343.8360777054.

The spelling of 40649418 in words is "forty million, six hundred forty-nine thousand, four hundred eighteen".