4086817978 has 16 divisors (see below), whose sum is σ = 6462618624. Its totient is φ = 1935416880.

The previous prime is 4086817949. The next prime is 4086817979. The reversal of 4086817978 is 8797186804.

It is not an unprimeable number, because it can be changed into a prime (4086817979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698325 + ... + 704152.

It is an arithmetic number, because the mean of its divisors is an integer number (403913664).

Almost surely, 2^4086817978 is an apocalyptic number.

4086817978 is a deficient number, since it is larger than the sum of its proper divisors (2375800646).

4086817978 is a wasteful number, since it uses less digits than its factorization.

4086817978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402557.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The square root of 4086817978 is about 63928.2252060856. The cubic root of 4086817978 is about 1598.8035297286.

The spelling of 4086817978 in words is "four billion, eighty-six million, eight hundred seventeen thousand, nine hundred seventy-eight".