2782178228 has 12 divisors (see below), whose sum is σ = 4889016132. Its totient is φ = 1385316480.

The previous prime is 2782178143. The next prime is 2782178257. The reversal of 2782178228 is 8228712872.

It can be written as a sum of positive squares in 2 ways, for example, as 1159538704 + 1622639524 = 34052^2 + 40282^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1442075 + ... + 1444002.

It is an arithmetic number, because the mean of its divisors is an integer number (407418011).

Almost surely, 2^2782178228 is an apocalyptic number.

It is an amenable number.

2782178228 is a deficient number, since it is larger than the sum of its proper divisors (2106837904).

2782178228 is a wasteful number, since it uses less digits than its factorization.

2782178228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886322 (or 2886320 counting only the distinct ones).

The product of its digits is 401408, while the sum is 47.

The square root of 2782178228 is about 52746.3574856122. The cubic root of 2782178228 is about 1406.4630139000.

The spelling of 2782178228 in words is "two billion, seven hundred eighty-two million, one hundred seventy-eight thousand, two hundred twenty-eight".