2840878656 has 420 divisors, whose sum is σ = 10595116224. Its totient is φ = 736750080.

The previous prime is 2840878627. The next prime is 2840878661. The reversal of 2840878656 is 6568780482.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4390525 + ... + 4391171.

Almost surely, 2^2840878656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2840878656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5297558112).

2840878656 is an abundant number, since it is smaller than the sum of its proper divisors (7754237568).

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

2840878656 is a wasteful number, since it uses less digits than its factorization.

2840878656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The square root of 2840878656 is about 53299.8935833834. The cubic root of 2840878656 is about 1416.2857797226.

The spelling of 2840878656 in words is "two billion, eight hundred forty million, eight hundred seventy-eight thousand, six hundred fifty-six".