40644968 has 64 divisors (see below), whose sum is σ = 96875520. Its totient is φ = 15552000.

The previous prime is 40644931. The next prime is 40644973. The reversal of 40644968 is 86944604.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21668 + ... + 23468.

It is an arithmetic number, because the mean of its divisors is an integer number (1513680).

Almost surely, 2^40644968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40644968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48437760).

40644968 is an abundant number, since it is smaller than the sum of its proper divisors (56230552).

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

40644968 is a wasteful number, since it uses less digits than its factorization.

40644968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 40644968 is about 6375.3406183513. The cubic root of 40644968 is about 343.8235303639.

The spelling of 40644968 in words is "forty million, six hundred forty-four thousand, nine hundred sixty-eight".