40639078 has 16 divisors (see below), whose sum is σ = 66628224. Its totient is φ = 18506880.

The previous prime is 40639057. The next prime is 40639087. The reversal of 40639078 is 87093604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18225 + ... + 20332.

It is an arithmetic number, because the mean of its divisors is an integer number (4164264).

Almost surely, 2^40639078 is an apocalyptic number.

40639078 is a deficient number, since it is larger than the sum of its proper divisors (25989146).

40639078 is a wasteful number, since it uses less digits than its factorization.

40639078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38607.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 40639078 is about 6374.8786655120. The cubic root of 40639078 is about 343.8069213508.

The spelling of 40639078 in words is "forty million, six hundred thirty-nine thousand, seventy-eight".