40640086 has 4 divisors (see below), whose sum is σ = 60960132. Its totient is φ = 20320042.

The previous prime is 40640053. The next prime is 40640113. The reversal of 40640086 is 68004604.

40640086 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 is a congruent number.

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 as a sum of consecutive naturals, namely, 10160020 + ... + 10160023.

It is an arithmetic number, because the mean of its divisors is an integer number (15240033).

Almost surely, 2^40640086 is an apocalyptic number.

40640086 is a deficient number, since it is larger than the sum of its proper divisors (20320046).

40640086 is a wasteful number, since it uses less digits than its factorization.

40640086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20320045.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 40640086 is about 6374.9577253500. The cubic root of 40640086 is about 343.8097638899.

The spelling of 40640086 in words is "forty million, six hundred forty thousand, eighty-six".