1283953356 has 120 divisors (see below), whose sum is σ = 4061778336. Its totient is φ = 345254400.

The previous prime is 1283953351. The next prime is 1283953369. The reversal of 1283953356 is 6533593821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1283953351) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21906 + ... + 55206.

Almost surely, 2^1283953356 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 1283953356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2030889168).

1283953356 is an abundant number, since it is smaller than the sum of its proper divisors (2777824980).

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

1283953356 is a wasteful number, since it uses less digits than its factorization.

1283953356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33341 (or 33330 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 1283953356 is about 35832.2948748751. The cubic root of 1283953356 is about 1086.8837164558.

The spelling of 1283953356 in words is "one billion, two hundred eighty-three million, nine hundred fifty-three thousand, three hundred fifty-six".