40139882 has 4 divisors (see below), whose sum is σ = 60209826. Its totient is φ = 20069940.

The previous prime is 40139863. The next prime is 40139887. The reversal of 40139882 is 28893104.

It is a happy number.

40139882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 4844401 = 5941^2 + 2201^2 .

It is a super-2 number, since 2×40139882² = 3222420253947848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40139887) 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 as a sum of consecutive naturals, namely, 10034969 + ... + 10034972.

Almost surely, 2^40139882 is an apocalyptic number.

40139882 is a deficient number, since it is larger than the sum of its proper divisors (20069944).

40139882 is a wasteful number, since it uses less digits than its factorization.

40139882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20069943.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40139882 is about 6335.6043121395. The cubic root of 40139882 is about 342.3933836193.

The spelling of 40139882 in words is "forty million, one hundred thirty-nine thousand, eight hundred eighty-two".