1285890608 has 40 divisors (see below), whose sum is σ = 2652642720. Its totient is φ = 601758720.

The previous prime is 1285890581. The next prime is 1285890623. The reversal of 1285890608 is 8060985821.

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 in 7 ways as a sum of consecutive naturals, for example, 36173 + ... + 62291.

It is an arithmetic number, because the mean of its divisors is an integer number (66316068).

Almost surely, 2^1285890608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285890608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326321360).

1285890608 is an abundant number, since it is smaller than the sum of its proper divisors (1366752112).

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

1285890608 is a wasteful number, since it uses less digits than its factorization.

1285890608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26325 (or 26319 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 1285890608 is about 35859.3168925455. The cubic root of 1285890608 is about 1087.4300783511.

The spelling of 1285890608 in words is "one billion, two hundred eighty-five million, eight hundred ninety thousand, six hundred eight".