2558278428 has 12 divisors (see below), whose sum is σ = 5969316360. Its totient is φ = 852759472.

The previous prime is 2558278417. The next prime is 2558278447. The reversal of 2558278428 is 8248728552.

It is a happy number.

2558278428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 106594923 + ... + 106594946.

It is an arithmetic number, because the mean of its divisors is an integer number (497443030).

Almost surely, 2^2558278428 is an apocalyptic number.

It is an amenable number.

2558278428 is an abundant number, since it is smaller than the sum of its proper divisors (3411037932).

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

2558278428 is a wasteful number, since it uses less digits than its factorization.

2558278428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213189876 (or 213189874 counting only the distinct ones).

The product of its digits is 2867200, while the sum is 51.

The square root of 2558278428 is about 50579.4269243929. The cubic root of 2558278428 is about 1367.6740378769.

The spelling of 2558278428 in words is "two billion, five hundred fifty-eight million, two hundred seventy-eight thousand, four hundred twenty-eight".