1285218704 has 80 divisors (see below), whose sum is σ = 3111229440. Its totient is φ = 499658880.

The previous prime is 1285218629. The next prime is 1285218731. The reversal of 1285218704 is 4078125821.

It is a super-2 number, since 2×1285218704² = 3303574234222879232, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 811097 + ... + 812679.

It is an arithmetic number, because the mean of its divisors is an integer number (38890368).

Almost surely, 2^1285218704 is an apocalyptic number.

1285218704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285218704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555614720).

1285218704 is an abundant number, since it is smaller than the sum of its proper divisors (1826010736).

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

1285218704 is a wasteful number, since it uses less digits than its factorization.

1285218704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2262 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 1285218704 is about 35849.9470571436. The cubic root of 1285218704 is about 1087.2406439074.

The spelling of 1285218704 in words is "one billion, two hundred eighty-five million, two hundred eighteen thousand, seven hundred four".