1031013440 has 28 divisors (see below), whose sum is σ = 2455101516. Its totient is φ = 412405248.

The previous prime is 1031013439. The next prime is 1031013449. The reversal of 1031013440 is 443101301.

It can be written as a sum of positive squares in 2 ways, for example, as 797045824 + 233967616 = 28232^2 + 15296^2 .

It is not an unprimeable number, because it can be changed into a prime (1031013449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610639 + ... + 1611278.

It is an arithmetic number, because the mean of its divisors is an integer number (87682197).

Almost surely, 2^1031013440 is an apocalyptic number.

1031013440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031013440 is an abundant number, since it is smaller than the sum of its proper divisors (1424088076).

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

1031013440 is an equidigital number, since it uses as much as digits as its factorization.

1031013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221934 (or 3221924 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1031013440 is about 32109.3980012083. The cubic root of 1031013440 is about 1010.2327470668.

Adding to 1031013440 its reverse (443101301), we get a palindrome (1474114741).

The spelling of 1031013440 in words is "one billion, thirty-one million, thirteen thousand, four hundred forty".