1031440423 has 8 divisors (see below), whose sum is σ = 1116990000. Its totient is φ = 946777728.

The previous prime is 1031440349. The next prime is 1031440429. The reversal of 1031440423 is 3240441301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1031440423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031440394 and 1031440403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031440429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219298 + ... + 223951.

It is an arithmetic number, because the mean of its divisors is an integer number (139623750).

Almost surely, 2^1031440423 is an apocalyptic number.

1031440423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1031440423 is a deficient number, since it is larger than the sum of its proper divisors (85549577).

1031440423 is a wasteful number, since it uses less digits than its factorization.

1031440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443441.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1031440423 is about 32116.0461918960. The cubic root of 1031440423 is about 1010.3721867868.

Adding to 1031440423 its reverse (3240441301), we get a palindrome (4271881724).

The spelling of 1031440423 in words is "one billion, thirty-one million, four hundred forty thousand, four hundred twenty-three".