1003253440 has 168 divisors, whose sum is σ = 2809311120. Its totient is φ = 340236288.

The previous prime is 1003253401. The next prime is 1003253473. The reversal of 1003253440 is 443523001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1708827 + ... + 1709413.

It is an arithmetic number, because the mean of its divisors is an integer number (16722090).

Almost surely, 2^1003253440 is an apocalyptic number.

1003253440 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 1003253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404655560).

1003253440 is an abundant number, since it is smaller than the sum of its proper divisors (1806057680).

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

1003253440 is a wasteful number, since it uses less digits than its factorization.

1003253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1003253440 is about 31674.1762323821. The cubic root of 1003253440 is about 1001.0833060243.

Adding to 1003253440 its reverse (443523001), we get a palindrome (1446776441).

The spelling of 1003253440 in words is "one billion, three million, two hundred fifty-three thousand, four hundred forty".