1283578628 has 12 divisors (see below), whose sum is σ = 2323720140. Its totient is φ = 619658592.

The previous prime is 1283578613. The next prime is 1283578679. The reversal of 1283578628 is 8268753821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 755590144 + 527988484 = 27488^2 + 22978^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5532551 + ... + 5532782.

It is an arithmetic number, because the mean of its divisors is an integer number (193643345).

Almost surely, 2^1283578628 is an apocalyptic number.

It is an amenable number.

1283578628 is a deficient number, since it is larger than the sum of its proper divisors (1040141512).

1283578628 is a wasteful number, since it uses less digits than its factorization.

1283578628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065366 (or 11065364 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 1283578628 is about 35827.0655789726. The cubic root of 1283578628 is about 1086.7779687434. Note that the first 3 decimals are identical.

The spelling of 1283578628 in words is "one billion, two hundred eighty-three million, five hundred seventy-eight thousand, six hundred twenty-eight".