1285858460 has 24 divisors (see below), whose sum is σ = 2701718880. Its totient is φ = 514073664.

The previous prime is 1285858391. The next prime is 1285858471. The reversal of 1285858460 is 648585821.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24737 + ... + 56423.

It is an arithmetic number, because the mean of its divisors is an integer number (112571620).

Almost surely, 2^1285858460 is an apocalyptic number.

1285858460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285858460 is an abundant number, since it is smaller than the sum of its proper divisors (1415860420).

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

1285858460 is a wasteful number, since it uses less digits than its factorization.

1285858460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33725 (or 33723 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 47.

The square root of 1285858460 is about 35858.8686380371. The cubic root of 1285858460 is about 1087.4210161512.

The spelling of 1285858460 in words is "one billion, two hundred eighty-five million, eight hundred fifty-eight thousand, four hundred sixty".