2580781428 has 36 divisors (see below), whose sum is σ = 6530917120. Its totient is φ = 859301136.

The previous prime is 2580781393. The next prime is 2580781433. The reversal of 2580781428 is 8241870852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 6868 + ... + 72171.

Almost surely, 2^2580781428 is an apocalyptic number.

It is an amenable number.

2580781428 is an abundant number, since it is smaller than the sum of its proper divisors (3950135692).

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

2580781428 is a wasteful number, since it uses less digits than its factorization.

2580781428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79956 (or 79951 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The square root of 2580781428 is about 50801.3919888028. The cubic root of 2580781428 is about 1371.6724257410.

The spelling of 2580781428 in words is "two billion, five hundred eighty million, seven hundred eighty-one thousand, four hundred twenty-eight".