2778028005 has 32 divisors (see below), whose sum is σ = 4530670848. Its totient is φ = 1453222400.

The previous prime is 2778028003. The next prime is 2778028009. The reversal of 2778028005 is 5008208772.

It is not a de Polignac number, because 2778028005 - 2¹ = 2778028003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778028003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203185 + ... + 216425.

It is an arithmetic number, because the mean of its divisors is an integer number (141583464).

Almost surely, 2^2778028005 is an apocalyptic number.

It is an amenable number.

2778028005 is a deficient number, since it is larger than the sum of its proper divisors (1752642843).

2778028005 is a wasteful number, since it uses less digits than its factorization.

2778028005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13517.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 2778028005 is about 52707.0014798793. The cubic root of 2778028005 is about 1405.7633175315.

The spelling of 2778028005 in words is "two billion, seven hundred seventy-eight million, twenty-eight thousand, five".