1283555556 has 72 divisors (see below), whose sum is σ = 3448003104. Its totient is φ = 401207040.

The previous prime is 1283555543. The next prime is 1283555563. The reversal of 1283555556 is 6555553821.

It is a happy number.

1283555556 is a `hidden beast` number, since 12 + 8 + 35 + 55 + 556 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169491 + ... + 176901.

It is an arithmetic number, because the mean of its divisors is an integer number (47888932).

Almost surely, 2^1283555556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1283555556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724001552).

1283555556 is an abundant number, since it is smaller than the sum of its proper divisors (2164447548).

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

1283555556 is a wasteful number, since it uses less digits than its factorization.

1283555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721 (or 7716 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The square root of 1283555556 is about 35826.7435863211. The cubic root of 1283555556 is about 1086.7714571850.

The spelling of 1283555556 in words is "one billion, two hundred eighty-three million, five hundred fifty-five thousand, five hundred fifty-six".