278028900000 has 864 divisors, whose sum is σ = 1059513436800. Its totient is φ = 68947200000.

The previous prime is 278028899971. The next prime is 278028900011. The reversal of 278028900000 is 9820872.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1214099886 + ... + 1214100114.

It is an arithmetic number, because the mean of its divisors is an integer number (1226288700).

Almost surely, 2^278028900000 is an apocalyptic number.

278028900000 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 278028900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529756718400).

278028900000 is an abundant number, since it is smaller than the sum of its proper divisors (781484536800).

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

278028900000 is a wasteful number, since it uses less digits than its factorization.

278028900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 278028900000 in words is "two hundred seventy-eight billion, twenty-eight million, nine hundred thousand".