1283603126440 has 64 divisors (see below), whose sum is σ = 2896959070800. Its totient is φ = 511868239872.

The previous prime is 1283603126413. The next prime is 1283603126441. The reversal of 1283603126440 is 446213063821.

It can be written as a sum of positive squares in 8 ways, for example, as 328092966436 + 955510160004 = 572794^2 + 977502^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1283603126393 and 1283603126402.

It is not an unprimeable number, because it can be changed into a prime (1283603126441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85743276 + ... + 85758244.

Almost surely, 2^{1283603126440} is an apocalyptic number.

1283603126440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283603126440 is an abundant number, since it is smaller than the sum of its proper divisors (1613355944360).

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

1283603126440 is a wasteful number, since it uses less digits than its factorization.

1283603126440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21406 (or 21402 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 1283603126440 in words is "one trillion, two hundred eighty-three billion, six hundred three million, one hundred twenty-six thousand, four hundred forty".