1283783136 has 72 divisors (see below), whose sum is σ = 3490361784. Its totient is φ = 413145600.

The previous prime is 1283783131. The next prime is 1283783147. The reversal of 1283783136 is 6313873821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283783131) 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, 72786 + ... + 88686.

It is an arithmetic number, because the mean of its divisors is an integer number (48477247).

Almost surely, 2^1283783136 is an apocalyptic number.

1283783136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1283783136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1745180892).

1283783136 is an abundant number, since it is smaller than the sum of its proper divisors (2206578648).

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

1283783136 is a wasteful number, since it uses less digits than its factorization.

1283783136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15972 (or 15935 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 1283783136 is about 35829.9195645204. The cubic root of 1283783136 is about 1086.8356831629.

The spelling of 1283783136 in words is "one billion, two hundred eighty-three million, seven hundred eighty-three thousand, one hundred thirty-six".