40308642 has 24 divisors (see below), whose sum is σ = 95275440. Its totient is φ = 12214680.

The previous prime is 40308613. The next prime is 40308659. The reversal of 40308642 is 24680304.

40308642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 101592 + ... + 101987.

It is an arithmetic number, because the mean of its divisors is an integer number (3969810).

Almost surely, 2^40308642 is an apocalyptic number.

40308642 is an abundant number, since it is smaller than the sum of its proper divisors (54966798).

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

40308642 is a wasteful number, since it uses less digits than its factorization.

40308642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203598 (or 203595 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40308642 is about 6348.9087251275. The cubic root of 40308642 is about 342.8725539204.

Adding to 40308642 its reverse (24680304), we get a palindrome (64988946).

The spelling of 40308642 in words is "forty million, three hundred eight thousand, six hundred forty-two".