1023444257 has 12 divisors (see below), whose sum is σ = 1146175380. Its totient is φ = 912843360.

The previous prime is 1023444241. The next prime is 1023444259. The reversal of 1023444257 is 7524443201.

It can be written as a sum of positive squares in 2 ways, for example, as 317160481 + 706283776 = 17809^2 + 26576^2 .

It is not a de Polignac number, because 1023444257 - 2⁴ = 1023444241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023444259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73382 + ... + 86207.

It is an arithmetic number, because the mean of its divisors is an integer number (95514615).

Almost surely, 2^1023444257 is an apocalyptic number.

It is an amenable number.

1023444257 is a deficient number, since it is larger than the sum of its proper divisors (122731123).

1023444257 is a wasteful number, since it uses less digits than its factorization.

1023444257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159664 (or 159653 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 1023444257 is about 31991.3153371349. The cubic root of 1023444257 is about 1007.7544651734.

Adding to 1023444257 its reverse (7524443201), we get a palindrome (8547887458).

It can be divided in two parts, 102344 and 4257, that added together give a palindrome (106601).

The spelling of 1023444257 in words is "one billion, twenty-three million, four hundred forty-four thousand, two hundred fifty-seven".