39978629814 has 32 divisors (see below), whose sum is σ = 81300153600. Its totient is φ = 13102567200.

The previous prime is 39978629807. The next prime is 39978629827. The reversal of 39978629814 is 41892687993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967599 + ... + 1008069.

It is an arithmetic number, because the mean of its divisors is an integer number (2540629800).

Almost surely, 2^39978629814 is an apocalyptic number.

39978629814 is an abundant number, since it is smaller than the sum of its proper divisors (41321523786).

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

39978629814 is a wasteful number, since it uses less digits than its factorization.

39978629814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43236.

The product of its digits is 47029248, while the sum is 66.

The spelling of 39978629814 in words is "thirty-nine billion, nine hundred seventy-eight million, six hundred twenty-nine thousand, eight hundred fourteen".