278206934340 has 24 divisors (see below), whose sum is σ = 778979416320. Its totient is φ = 74188515808.

The previous prime is 278206934339. The next prime is 278206934359. The reversal of 278206934340 is 43439602872.

It is a super-2 number, since 2×278206934340² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 278206934340.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2318391060 + ... + 2318391179.

It is an arithmetic number, because the mean of its divisors is an integer number (32457475680).

Almost surely, 2^278206934340 is an apocalyptic number.

278206934340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278206934340 is an abundant number, since it is smaller than the sum of its proper divisors (500772481980).

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

278206934340 is a wasteful number, since it uses less digits than its factorization.

278206934340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636782251 (or 4636782249 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 278206934340 in words is "two hundred seventy-eight billion, two hundred six million, nine hundred thirty-four thousand, three hundred forty".