1285469568 has 128 divisors (see below), whose sum is σ = 3807129600. Its totient is φ = 427000320.

The previous prime is 1285469513. The next prime is 1285469587. The reversal of 1285469568 is 8659645821.

1285469568 is a `hidden beast` number, since 1 + 2 + 8 + 546 + 95 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489105 + ... + 1489967.

It is an arithmetic number, because the mean of its divisors is an integer number (29743200).

Almost surely, 2^1285469568 is an apocalyptic number.

1285469568 is a gapful number since it is divisible by the number (18) 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 1285469568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1903564800).

1285469568 is an abundant number, since it is smaller than the sum of its proper divisors (2521660032).

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

1285469568 is an equidigital number, since it uses as much as digits as its factorization.

1285469568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1299 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 1285469568 is about 35853.4456921507. The cubic root of 1285469568 is about 1087.3113794152.

The spelling of 1285469568 in words is "one billion, two hundred eighty-five million, four hundred sixty-nine thousand, five hundred sixty-eight".