40440660 has 96 divisors (see below), whose sum is σ = 123150720. Its totient is φ = 9856512.

The previous prime is 40440629. The next prime is 40440661. The reversal of 40440660 is 6604404.

It is a self number, because there is not a number n which added to its sum of digits gives 40440660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440661) 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 31 ways as a sum of consecutive naturals, for example, 108234 + ... + 108606.

It is an arithmetic number, because the mean of its divisors is an integer number (1282820).

Almost surely, 2^40440660 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 40440660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61575360).

40440660 is an abundant number, since it is smaller than the sum of its proper divisors (82710060).

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

40440660 is a wasteful number, since it uses less digits than its factorization.

40440660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40440660 is about 6359.2971309729. The cubic root of 40440660 is about 343.2464689498.

The spelling of 40440660 in words is "forty million, four hundred forty thousand, six hundred sixty".