1283788 has 24 divisors (see below), whose sum is σ = 2479680. Its totient is φ = 576720.

The previous prime is 1283771. The next prime is 1283797. The reversal of 1283788 is 8873821.

It is a super-2 number, since 2×1283788² = 3296223257888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7083 + ... + 7261.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2^1283788 is an apocalyptic number.

It is an amenable number.

1283788 is a deficient number, since it is larger than the sum of its proper divisors (1195892).

1283788 is a wasteful number, since it uses less digits than its factorization.

1283788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 355 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 1283788 is about 1133.0436884781. The cubic root of 1283788 is about 108.6837055763.

It can be divided in two parts, 128 and 3788, that added together give a triangular number (3916 = T₈₈).

The spelling of 1283788 in words is "one million, two hundred eighty-three thousand, seven hundred eighty-eight".