1023520520 has 32 divisors (see below), whose sum is σ = 2512278720. Its totient is φ = 372189120.

The previous prime is 1023520499. The next prime is 1023520549. The reversal of 1023520520 is 250253201.

It is a super-2 number, since 2×1023520520² = 2095188509722140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1023520492 and 1023520501.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1162652 + ... + 1163531.

It is an arithmetic number, because the mean of its divisors is an integer number (78508710).

Almost surely, 2^1023520520 is an apocalyptic number.

1023520520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023520520 is an abundant number, since it is smaller than the sum of its proper divisors (1488758200).

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

1023520520 is a wasteful number, since it uses less digits than its factorization.

1023520520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326205 (or 2326201 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1023520520 is about 31992.5072477916. The cubic root of 1023520520 is about 1007.7794958380.

Adding to 1023520520 its reverse (250253201), we get a palindrome (1273773721).

The spelling of 1023520520 in words is "one billion, twenty-three million, five hundred twenty thousand, five hundred twenty".