40081650 has 96 divisors (see below), whose sum is σ = 115706880. Its totient is φ = 8992320.

The previous prime is 40081649. The next prime is 40081651. The reversal of 40081650 is 5618004.

40081650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40081649) and next prime (40081651).

It is a self number, because there is not a number n which added to its sum of digits gives 40081650.

It is not an unprimeable number, because it can be changed into a prime (40081651) 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 47 ways as a sum of consecutive naturals, for example, 61627 + ... + 62273.

It is an arithmetic number, because the mean of its divisors is an integer number (1205280).

Almost surely, 2^40081650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40081650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57853440).

40081650 is an abundant number, since it is smaller than the sum of its proper divisors (75625230).

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

40081650 is a wasteful number, since it uses less digits than its factorization.

40081650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 40081650 is about 6331.0070289015. The cubic root of 40081650 is about 342.2277304090.

Adding to 40081650 its reverse (5618004), we get a palindrome (45699654).

The spelling of 40081650 in words is "forty million, eighty-one thousand, six hundred fifty".