2078427858 has 64 divisors (see below), whose sum is σ = 4558135680. Its totient is φ = 627973632.

The previous prime is 2078427851. The next prime is 2078427863. The reversal of 2078427858 is 8587248702.

It is a self number, because there is not a number n which added to its sum of digits gives 2078427858.

It is not an unprimeable number, because it can be changed into a prime (2078427851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088941 + ... + 1090847.

It is an arithmetic number, because the mean of its divisors is an integer number (71220870).

Almost surely, 2^2078427858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2078427858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279067840).

2078427858 is an abundant number, since it is smaller than the sum of its proper divisors (2479707822).

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

2078427858 is a wasteful number, since it uses less digits than its factorization.

2078427858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 2007040, while the sum is 51.

The square root of 2078427858 is about 45589.7779990208. Note that the first 3 decimals coincide. The cubic root of 2078427858 is about 1276.1791696370.

The spelling of 2078427858 in words is "two billion, seventy-eight million, four hundred twenty-seven thousand, eight hundred fifty-eight".