2678784140 has 24 divisors (see below), whose sum is σ = 5696658240. Its totient is φ = 1057949568.

The previous prime is 2678784137. The next prime is 2678784149. The reversal of 2678784140 is 414878762.

It is not an unprimeable number, because it can be changed into a prime (2678784149) 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, 846137 + ... + 849296.

It is an arithmetic number, because the mean of its divisors is an integer number (237360760).

Almost surely, 2^2678784140 is an apocalyptic number.

2678784140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2678784140 is an abundant number, since it is smaller than the sum of its proper divisors (3017874100).

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

2678784140 is a wasteful number, since it uses less digits than its factorization.

2678784140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695521 (or 1695519 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 47.

The square root of 2678784140 is about 51756.9718975135. The cubic root of 2678784140 is about 1388.8198218834.

The spelling of 2678784140 in words is "two billion, six hundred seventy-eight million, seven hundred eighty-four thousand, one hundred forty".