1303123440 has 160 divisors (see below), whose sum is σ = 4415717376. Its totient is φ = 316477440.

The previous prime is 1303123433. The next prime is 1303123517. The reversal of 1303123440 is 443213031.

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, 121329 + ... + 131631.

Almost surely, 2^1303123440 is an apocalyptic number.

1303123440 is a gapful number since it is divisible by the number (10) 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 1303123440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207858688).

1303123440 is an abundant number, since it is smaller than the sum of its proper divisors (3112593936).

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

1303123440 is a wasteful number, since it uses less digits than its factorization.

1303123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367 (or 10361 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1303123440 is about 36098.8010881248. The cubic root of 1303123440 is about 1092.2662609324.

Adding to 1303123440 its reverse (443213031), we get a palindrome (1746336471).

The spelling of 1303123440 in words is "one billion, three hundred three million, one hundred twenty-three thousand, four hundred forty".