1283423652 has 144 divisors (see below), whose sum is σ = 3899750400. Its totient is φ = 348122880.

The previous prime is 1283423641. The next prime is 1283423657. The reversal of 1283423652 is 2563243821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1283423657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 444349 + ... + 447227.

It is an arithmetic number, because the mean of its divisors is an integer number (27081600).

Almost surely, 2^1283423652 is an apocalyptic number.

1283423652 is a gapful number since it is divisible by the number (12) 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 1283423652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949875200).

1283423652 is an abundant number, since it is smaller than the sum of its proper divisors (2616326748).

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

1283423652 is a wasteful number, since it uses less digits than its factorization.

1283423652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 2981 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1283423652 is about 35824.9026795608. The cubic root of 1283423652 is about 1086.7342287191.

The spelling of 1283423652 in words is "one billion, two hundred eighty-three million, four hundred twenty-three thousand, six hundred fifty-two".