1283887728 has 60 divisors (see below), whose sum is σ = 3597780888. Its totient is φ = 427405440.

The previous prime is 1283887727. The next prime is 1283887733. The reversal of 1283887728 is 8277883821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283887721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113698 + ... + 124478.

Almost surely, 2^1283887728 is an apocalyptic number.

1283887728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1283887728 is an abundant number, since it is smaller than the sum of its proper divisors (2313893160).

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

1283887728 is a wasteful number, since it uses less digits than its factorization.

1283887728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11622 (or 11613 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 1283887728 is about 35831.3790970987. The cubic root of 1283887728 is about 1086.8651978132.

The spelling of 1283887728 in words is "one billion, two hundred eighty-three million, eight hundred eighty-seven thousand, seven hundred twenty-eight".