278009796870 has 96 divisors (see below), whose sum is σ = 778701924000. Its totient is φ = 68409050112.

The previous prime is 278009796847. The next prime is 278009796877. The reversal of 278009796870 is 78697900872.

It is a junction number, because it is equal to n+sod(n) for n = 278009796798 and 278009796807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278009796877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3398206 + ... + 3479054.

It is an arithmetic number, because the mean of its divisors is an integer number (8111478375).

Almost surely, 2^278009796870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278009796870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389350962000).

278009796870 is an abundant number, since it is smaller than the sum of its proper divisors (500692127130).

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

278009796870 is a wasteful number, since it uses less digits than its factorization.

278009796870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83814 (or 83811 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 278009796870 in words is "two hundred seventy-eight billion, nine million, seven hundred ninety-six thousand, eight hundred seventy".