1285772883840 has 512 divisors, whose sum is σ = 4815407923200. Its totient is φ = 323713843200.

The previous prime is 1285772883823. The next prime is 1285772883841. The reversal of 1285772883840 is 483882775821.

1285772883840 is a `hidden beast` number, since 1 + 2 + 8 + 577 + 28 + 8 + 38 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285772883841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21933609 + ... + 21992151.

It is an arithmetic number, because the mean of its divisors is an integer number (9405093600).

Almost surely, 2^{1285772883840} is an apocalyptic number.

1285772883840 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 1285772883840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407703961600).

1285772883840 is an abundant number, since it is smaller than the sum of its proper divisors (3529635039360).

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

1285772883840 is a wasteful number, since it uses less digits than its factorization.

1285772883840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58643 (or 58625 counting only the distinct ones).

The product of its (nonzero) digits is 48168960, while the sum is 63.

It can be divided in two parts, 1285772 and 883840, that added together give a palindrome (2169612).

The spelling of 1285772883840 in words is "one trillion, two hundred eighty-five billion, seven hundred seventy-two million, eight hundred eighty-three thousand, eight hundred forty".