40663530 has 48 divisors (see below), whose sum is σ = 106240680. Its totient is φ = 10790784.

The previous prime is 40663523. The next prime is 40663543. The reversal of 40663530 is 3536604.

It can be written as a sum of positive squares in 4 ways, for example, as 35748441 + 4915089 = 5979^2 + 2217^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40663494 and 40663503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19624 + ... + 21596.

Almost surely, 2^40663530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40663530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53120340).

40663530 is an abundant number, since it is smaller than the sum of its proper divisors (65577150).

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

40663530 is a wasteful number, since it uses less digits than its factorization.

40663530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 40663530 is about 6376.7962175375. The cubic root of 40663530 is about 343.8758622302.

It can be divided in two parts, 406 and 63530, that added together give a palindrome (63936).

The spelling of 40663530 in words is "forty million, six hundred sixty-three thousand, five hundred thirty".