1283747238 has 64 divisors (see below), whose sum is σ = 2926134720. Its totient is φ = 417021696.

The previous prime is 1283747221. The next prime is 1283747249. The reversal of 1283747238 is 8327473821.

Its product of digits (451584) is a multiple of the sum of its prime divisors (3072).

It is a junction number, because it is equal to n+sod(n) for n = 1283747193 and 1283747202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447906 + ... + 450762.

It is an arithmetic number, because the mean of its divisors is an integer number (45720855).

Almost surely, 2^1283747238 is an apocalyptic number.

1283747238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1283747238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463067360).

1283747238 is an abundant number, since it is smaller than the sum of its proper divisors (1642387482).

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

1283747238 is a wasteful number, since it uses less digits than its factorization.

1283747238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078 (or 3072 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 1283747238 is about 35829.4186109683. The cubic root of 1283747238 is about 1086.8255527938.

The spelling of 1283747238 in words is "one billion, two hundred eighty-three million, seven hundred forty-seven thousand, two hundred thirty-eight".