40366640 has 40 divisors (see below), whose sum is σ = 98795760. Its totient is φ = 15296256.

The previous prime is 40366607. The next prime is 40366643. The reversal of 40366640 is 4666304.

40366640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (40366643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11759 + ... + 14798.

It is an arithmetic number, because the mean of its divisors is an integer number (2469894).

Almost surely, 2^40366640 is an apocalyptic number.

40366640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40366640 is an abundant number, since it is smaller than the sum of its proper divisors (58429120).

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

40366640 is a wasteful number, since it uses less digits than its factorization.

40366640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26589 (or 26583 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 40366640 is about 6353.4746399116. The cubic root of 40366640 is about 343.0369222494.

The spelling of 40366640 in words is "forty million, three hundred sixty-six thousand, six hundred forty".