1285445358 has 96 divisors (see below), whose sum is σ = 2971987200. Its totient is φ = 400877568.

The previous prime is 1285445351. The next prime is 1285445363. The reversal of 1285445358 is 8535445821.

1285445358 is a `hidden beast` number, since 1 + 2 + 8 + 544 + 53 + 58 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285445351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2683363 + ... + 2683841.

It is an arithmetic number, because the mean of its divisors is an integer number (30958200).

Almost surely, 2^1285445358 is an apocalyptic number.

1285445358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285445358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485993600).

1285445358 is an abundant number, since it is smaller than the sum of its proper divisors (1686541842).

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

1285445358 is a wasteful number, since it uses less digits than its factorization.

1285445358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 663 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 1285445358 is about 35853.1080661077. The cubic root of 1285445358 is about 1087.3045533820.

The spelling of 1285445358 in words is "one billion, two hundred eighty-five million, four hundred forty-five thousand, three hundred fifty-eight".