40663040 has 144 divisors (see below), whose sum is σ = 112334040. Its totient is φ = 14008320.

The previous prime is 40663013. The next prime is 40663043. The reversal of 40663040 is 4036604.

It is a junction number, because it is equal to n+sod(n) for n = 40662997 and 40663015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2140151 + ... + 2140169.

Almost surely, 2^40663040 is an apocalyptic number.

40663040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40663040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56167020).

40663040 is an abundant number, since it is smaller than the sum of its proper divisors (71671000).

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

40663040 is a wasteful number, since it uses less digits than its factorization.

40663040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 40663040 is about 6376.7577968745. The cubic root of 40663040 is about 343.8744809773.

Adding to 40663040 its reverse (4036604), we get a palindrome (44699644).

The spelling of 40663040 in words is "forty million, six hundred sixty-three thousand, forty".