2678006394 has 64 divisors (see below), whose sum is σ = 6863788800. Its totient is φ = 758113344.

The previous prime is 2678006369. The next prime is 2678006399. The reversal of 2678006394 is 4936008762.

2678006394 is a `hidden beast` number, since 2 + 6 + 7 + 8 + 0 + 0 + 639 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (2678006399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8704 + ... + 73700.

It is an arithmetic number, because the mean of its divisors is an integer number (107246700).

Almost surely, 2^2678006394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2678006394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3431894400).

2678006394 is an abundant number, since it is smaller than the sum of its proper divisors (4185782406).

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

2678006394 is a wasteful number, since it uses less digits than its factorization.

2678006394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65124 (or 65118 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 2678006394 is about 51749.4579102042. The cubic root of 2678006394 is about 1388.6854009973.

The spelling of 2678006394 in words is "two billion, six hundred seventy-eight million, six thousand, three hundred ninety-four".