40663740 has 96 divisors (see below), whose sum is σ = 126020160. Its totient is φ = 9732096.

The previous prime is 40663687. The next prime is 40663751. The reversal of 40663740 is 4736604.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 40663698 and 40663707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28156 + ... + 29564.

It is an arithmetic number, because the mean of its divisors is an integer number (1312710).

Almost surely, 2^40663740 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 40663740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63010080).

40663740 is an abundant number, since it is smaller than the sum of its proper divisors (85356420).

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

40663740 is a wasteful number, since it uses less digits than its factorization.

40663740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 40663740 is about 6376.8126834650. The cubic root of 40663740 is about 343.8764541923.

It can be divided in two parts, 406 and 63740, that added together give a palindrome (64146).

The spelling of 40663740 in words is "forty million, six hundred sixty-three thousand, seven hundred forty".