2678220136 has 32 divisors (see below), whose sum is σ = 5160827880. Its totient is φ = 1302048000.

The previous prime is 2678220133. The next prime is 2678220157. The reversal of 2678220136 is 6310228762.

2678220136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2218975236 + 459244900 = 47106^2 + 21430^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 2678220095 and 2678220104.

It is not an unprimeable number, because it can be changed into a prime (2678220133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809686 + ... + 812986.

Almost surely, 2^2678220136 is an apocalyptic number.

It is an amenable number.

2678220136 is a deficient number, since it is larger than the sum of its proper divisors (2482607744).

2678220136 is a wasteful number, since it uses less digits than its factorization.

2678220136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085 (or 6081 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 2678220136 is about 51751.5230307283. The cubic root of 2678220136 is about 1388.7223454571.

Adding to 2678220136 its reverse (6310228762), we get a palindrome (8988448898).

The spelling of 2678220136 in words is "two billion, six hundred seventy-eight million, two hundred twenty thousand, one hundred thirty-six".