2581388 has 6 divisors (see below), whose sum is σ = 4517436. Its totient is φ = 1290692.

The previous prime is 2581373. The next prime is 2581391. The reversal of 2581388 is 8831852.

2581388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322670 + ... + 322677.

It is an arithmetic number, because the mean of its divisors is an integer number (752906).

2^2581388 is an apocalyptic number.

It is an amenable number.

2581388 is a deficient number, since it is larger than the sum of its proper divisors (1936048).

2581388 is a wasteful number, since it uses less digits than its factorization.

2581388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645351 (or 645349 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 2581388 is about 1606.6698478530. The cubic root of 2581388 is about 137.1779880651.

The spelling of 2581388 in words is "two million, five hundred eighty-one thousand, three hundred eighty-eight".