2781281346 has 8 divisors (see below), whose sum is σ = 5562562704. Its totient is φ = 927093780.

The previous prime is 2781281329. The next prime is 2781281369. The reversal of 2781281346 is 6431821872.

2781281346 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2781281346 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2781281298 and 2781281307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231773440 + ... + 231773451.

It is an arithmetic number, because the mean of its divisors is an integer number (695320338).

Almost surely, 2^2781281346 is an apocalyptic number.

2781281346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2781281346 is a wasteful number, since it uses less digits than its factorization.

2781281346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463546896.

The product of its digits is 129024, while the sum is 42.

The square root of 2781281346 is about 52737.8549620669. The cubic root of 2781281346 is about 1406.3118653119.

The spelling of 2781281346 in words is "two billion, seven hundred eighty-one million, two hundred eighty-one thousand, three hundred forty-six".