4278579894 has 80 divisors (see below), whose sum is σ = 9971958480. Its totient is φ = 1370053440.

The previous prime is 4278579889. The next prime is 4278579953. The reversal of 4278579894 is 4989758724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 419892 + ... + 429960.

It is an arithmetic number, because the mean of its divisors is an integer number (124649481).

Almost surely, 2^4278579894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4278579894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4985979240).

4278579894 is an abundant number, since it is smaller than the sum of its proper divisors (5693378586).

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

4278579894 is a wasteful number, since it uses less digits than its factorization.

4278579894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187 (or 10178 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The square root of 4278579894 is about 65410.8545579402. The cubic root of 4278579894 is about 1623.4286846674.

The spelling of 4278579894 in words is "four billion, two hundred seventy-eight million, five hundred seventy-nine thousand, eight hundred ninety-four".