40660240 has 40 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 16185216.

The previous prime is 40660237. The next prime is 40660303. The reversal of 40660240 is 4206604.

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

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 7 ways as a sum of consecutive naturals, for example, 17041 + ... + 19279.

It is an arithmetic number, because the mean of its divisors is an integer number (2374848).

Almost surely, 2^40660240 is an apocalyptic number.

40660240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40660240 is an abundant number, since it is smaller than the sum of its proper divisors (54333680).

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

40660240 is a wasteful number, since it uses less digits than its factorization.

40660240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 40660240 is about 6376.5382457882. The cubic root of 40660240 is about 343.8665878910.

Adding to 40660240 its reverse (4206604), we get a palindrome (44866844).

The spelling of 40660240 in words is "forty million, six hundred sixty thousand, two hundred forty".