1031340420 has 144 divisors (see below), whose sum is σ = 3469152960. Its totient is φ = 245894400.

The previous prime is 1031340407. The next prime is 1031340421. The reversal of 1031340420 is 240431301.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1031340393 and 1031340402.

It is not an unprimeable number, because it can be changed into a prime (1031340421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116511 + ... + 125049.

It is an arithmetic number, because the mean of its divisors is an integer number (24091340).

Almost surely, 2^1031340420 is an apocalyptic number.

1031340420 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 1031340420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734576480).

1031340420 is an abundant number, since it is smaller than the sum of its proper divisors (2437812540).

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

1031340420 is a wasteful number, since it uses less digits than its factorization.

1031340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626 (or 8621 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1031340420 is about 32114.4892532950. The cubic root of 1031340420 is about 1010.3395322863.

Adding to 1031340420 its reverse (240431301), we get a palindrome (1271771721).

The spelling of 1031340420 in words is "one billion, thirty-one million, three hundred forty thousand, four hundred twenty".