4278378786 has 32 divisors (see below), whose sum is σ = 9427081536. Its totient is φ = 1283640000.

The previous prime is 4278378781. The next prime is 4278378829. The reversal of 4278378786 is 6878738724.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4278378781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314245 + ... + 327576.

It is an arithmetic number, because the mean of its divisors is an integer number (294596298).

Almost surely, 2^4278378786 is an apocalyptic number.

4278378786 is an abundant number, since it is smaller than the sum of its proper divisors (5148702750).

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

4278378786 is a wasteful number, since it uses less digits than its factorization.

4278378786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641938.

The product of its digits is 25288704, while the sum is 60.

The square root of 4278378786 is about 65409.3172720829. The cubic root of 4278378786 is about 1623.4032486879.

The spelling of 4278378786 in words is "four billion, two hundred seventy-eight million, three hundred seventy-eight thousand, seven hundred eighty-six".