1020403344 has 80 divisors (see below), whose sum is σ = 2694367232. Its totient is φ = 332688384.

The previous prime is 1020403343. The next prime is 1020403357. The reversal of 1020403344 is 4433040201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020403344.

It is not an unprimeable number, because it can be changed into a prime (1020403343) 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, 443862 + ... + 446154.

Almost surely, 2^1020403344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020403344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347183616).

1020403344 is an abundant number, since it is smaller than the sum of its proper divisors (1673963888).

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

1020403344 is a wasteful number, since it uses less digits than its factorization.

1020403344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1020403344 is about 31943.7528164741. The cubic root of 1020403344 is about 1006.7553767903.

Adding to 1020403344 its reverse (4433040201), we get a palindrome (5453443545).

The spelling of 1020403344 in words is "one billion, twenty million, four hundred three thousand, three hundred forty-four".