40251630 has 32 divisors (see below), whose sum is σ = 96979968. Its totient is φ = 10692000.

The previous prime is 40251619. The next prime is 40251637. The reversal of 40251630 is 3615204.

It is a happy number.

40251630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40251597 and 40251606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40251637) 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 15 ways as a sum of consecutive naturals, for example, 5655 + ... + 10605.

It is an arithmetic number, because the mean of its divisors is an integer number (3030624).

Almost surely, 2^40251630 is an apocalyptic number.

40251630 is an abundant number, since it is smaller than the sum of its proper divisors (56728338).

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

40251630 is a wasteful number, since it uses less digits than its factorization.

40251630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40251630 is about 6344.4172309204. The cubic root of 40251630 is about 342.7108262081.

Adding to 40251630 its reverse (3615204), we get a palindrome (43866834).

The spelling of 40251630 in words is "forty million, two hundred fifty-one thousand, six hundred thirty".