8427378906 has 12 divisors (see below), whose sum is σ = 18259321002. Its totient is φ = 2809126296.

The previous prime is 8427378877. The next prime is 8427378913. The reversal of 8427378906 is 6098737248.

It can be written as a sum of positive squares in only one way, i.e., 5685914025 + 2741464881 = 75405^2 + 52359^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234093841 + ... + 234093876.

Almost surely, 2^8427378906 is an apocalyptic number.

8427378906 is an abundant number, since it is smaller than the sum of its proper divisors (9831942096).

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

8427378906 is a wasteful number, since it uses less digits than its factorization.

8427378906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468187725 (or 468187722 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 8427378906 is about 91800.7565655099. The cubic root of 8427378906 is about 2034.9988756139.

The spelling of 8427378906 in words is "eight billion, four hundred twenty-seven million, three hundred seventy-eight thousand, nine hundred six".