1285336788 has 24 divisors (see below), whose sum is σ = 3003198240. Its totient is φ = 427862880.

The previous prime is 1285336783. The next prime is 1285336813. The reversal of 1285336788 is 8876335821.

1285336788 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1285336788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285336783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63603 + ... + 81338.

It is an arithmetic number, because the mean of its divisors is an integer number (125133260).

Almost surely, 2^1285336788 is an apocalyptic number.

It is an amenable number.

1285336788 is an abundant number, since it is smaller than the sum of its proper divisors (1717861452).

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

1285336788 is a wasteful number, since it uses less digits than its factorization.

1285336788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145687 (or 145685 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 1285336788 is about 35851.5939394610. The cubic root of 1285336788 is about 1087.2739409103.

The spelling of 1285336788 in words is "one billion, two hundred eighty-five million, three hundred thirty-six thousand, seven hundred eighty-eight".