8478459690 has 32 divisors (see below), whose sum is σ = 20403774720. Its totient is φ = 2254759104.

The previous prime is 8478459667. The next prime is 8478459701. The reversal of 8478459690 is 969548748.

8478459690 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8478459690² (a number of 21 digits) contains 22 as substring.

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, 374025 + ... + 396044.

It is an arithmetic number, because the mean of its divisors is an integer number (637617960).

Almost surely, 2^8478459690 is an apocalyptic number.

8478459690 is an abundant number, since it is smaller than the sum of its proper divisors (11925315030).

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

8478459690 is a wasteful number, since it uses less digits than its factorization.

8478459690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770446.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The square root of 8478459690 is about 92078.5517370902. The cubic root of 8478459690 is about 2039.1021688282.

The spelling of 8478459690 in words is "eight billion, four hundred seventy-eight million, four hundred fifty-nine thousand, six hundred ninety".