1030323440 has 80 divisors (see below), whose sum is σ = 2533337856. Its totient is φ = 389068800.

The previous prime is 1030323439. The next prime is 1030323449. The reversal of 1030323440 is 443230301.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030323449) 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, 96614 + ... + 106746.

Almost surely, 2^1030323440 is an apocalyptic number.

1030323440 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 1030323440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266668928).

1030323440 is an abundant number, since it is smaller than the sum of its proper divisors (1503014416).

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

1030323440 is a wasteful number, since it uses less digits than its factorization.

1030323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218 (or 10212 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1030323440 is about 32098.6516850786. The cubic root of 1030323440 is about 1010.0073325612.

Adding to 1030323440 its reverse (443230301), we get a palindrome (1473553741).

The spelling of 1030323440 in words is "one billion, thirty million, three hundred twenty-three thousand, four hundred forty".