1285308080 has 160 divisors (see below), whose sum is σ = 3615197184. Its totient is φ = 415438848.

The previous prime is 1285308061. The next prime is 1285308083. The reversal of 1285308080 is 808035821.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1285308080.

It is not an unprimeable number, because it can be changed into a prime (1285308083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 939557 + ... + 940923.

Almost surely, 2^1285308080 is an apocalyptic number.

1285308080 is a gapful number since it is divisible by the number (10) 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 1285308080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807598592).

1285308080 is an abundant number, since it is smaller than the sum of its proper divisors (2329889104).

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

1285308080 is a wasteful number, since it uses less digits than its factorization.

1285308080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483 (or 1477 counting only the distinct ones).

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

The square root of 1285308080 is about 35851.1935645105. The cubic root of 1285308080 is about 1087.2658460947.

The spelling of 1285308080 in words is "one billion, two hundred eighty-five million, three hundred eight thousand, eighty".