2146840878 has 32 divisors (see below), whose sum is σ = 5284532736. Its totient is φ = 566199648.

The previous prime is 2146840877. The next prime is 2146840909. The reversal of 2146840878 is 8780486412.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146840877) 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, 1965426 + ... + 1966517.

It is an arithmetic number, because the mean of its divisors is an integer number (165141648).

Almost surely, 2^2146840878 is an apocalyptic number.

2146840878 is an abundant number, since it is smaller than the sum of its proper divisors (3137691858).

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

2146840878 is a wasteful number, since it uses less digits than its factorization.

2146840878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931968.

The product of its (nonzero) digits is 688128, while the sum is 48.

The square root of 2146840878 is about 46334.0142659796. The cubic root of 2146840878 is about 1290.0304217331.

The spelling of 2146840878 in words is "two billion, one hundred forty-six million, eight hundred forty thousand, eight hundred seventy-eight".