2142878784 has 56 divisors (see below), whose sum is σ = 5676960960. Its totient is φ = 713378304.

The previous prime is 2142878783. The next prime is 2142878831. The reversal of 2142878784 is 4878782412.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2142878783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152437 + ... + 165899.

Almost surely, 2^2142878784 is an apocalyptic number.

2142878784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2142878784 is an abundant number, since it is smaller than the sum of its proper divisors (3534082176).

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

2142878784 is a wasteful number, since it uses less digits than its factorization.

2142878784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14307 (or 14297 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 51.

The square root of 2142878784 is about 46291.2387390962. The cubic root of 2142878784 is about 1289.2363294453.

The spelling of 2142878784 in words is "two billion, one hundred forty-two million, eight hundred seventy-eight thousand, seven hundred eighty-four".