2778597252 has 18 divisors (see below), whose sum is σ = 7023676478. Its totient is φ = 926199072.

The previous prime is 2778597223. The next prime is 2778597257. The reversal of 2778597252 is 2527958772.

2778597252 is a `hidden beast` number, since 27 + 7 + 8 + 597 + 25 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2552876676 + 225720576 = 50526^2 + 15024^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (2778597257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38591593 + ... + 38591664.

Almost surely, 2^2778597252 is an apocalyptic number.

It is an amenable number.

2778597252 is an abundant number, since it is smaller than the sum of its proper divisors (4245079226).

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

2778597252 is a wasteful number, since it uses less digits than its factorization.

2778597252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77183267 (or 77183262 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 54.

The square root of 2778597252 is about 52712.4013112664. The cubic root of 2778597252 is about 1405.8593295104.

The spelling of 2778597252 in words is "two billion, seven hundred seventy-eight million, five hundred ninety-seven thousand, two hundred fifty-two".