1023000520 has 32 divisors (see below), whose sum is σ = 2381124600. Its totient is φ = 395089408.

The previous prime is 1023000499. The next prime is 1023000521. The reversal of 1023000520 is 250003201.

It can be written as a sum of positive squares in 4 ways, for example, as 831399556 + 191600964 = 28834^2 + 13842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1023000520.

It is not an unprimeable number, because it can be changed into a prime (1023000521) 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, 439789 + ... + 442108.

Almost surely, 2^1023000520 is an apocalyptic number.

1023000520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023000520 is an abundant number, since it is smaller than the sum of its proper divisors (1358124080).

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

1023000520 is a wasteful number, since it uses less digits than its factorization.

1023000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881937 (or 881933 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 1023000520 is about 31984.3793124081. The cubic root of 1023000520 is about 1007.6087993385.

Adding to 1023000520 its reverse (250003201), we get a palindrome (1273003721).

The spelling of 1023000520 in words is "one billion, twenty-three million, five hundred twenty", and thus it is an aban number.