2878640280 has 96 divisors (see below), whose sum is σ = 9395006400. Its totient is φ = 764402688.

The previous prime is 2878640269. The next prime is 2878640287. The reversal of 2878640280 is 820468782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878640287) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 69312 + ... + 102768.

It is an arithmetic number, because the mean of its divisors is an integer number (97864650).

Almost surely, 2^2878640280 is an apocalyptic number.

2878640280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2878640280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4697503200).

2878640280 is an abundant number, since it is smaller than the sum of its proper divisors (6516366120).

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

2878640280 is a wasteful number, since it uses less digits than its factorization.

2878640280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33713 (or 33706 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 2878640280 is about 53652.9615212432. The cubic root of 2878640280 is about 1422.5333801160.

The spelling of 2878640280 in words is "two billion, eight hundred seventy-eight million, six hundred forty thousand, two hundred eighty".