1020445500 has 48 divisors (see below), whose sum is σ = 2971541664. Its totient is φ = 272118400.

The previous prime is 1020445487. The next prime is 1020445537. The reversal of 1020445500 is 55440201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338649 + ... + 341648.

It is an arithmetic number, because the mean of its divisors is an integer number (61907118).

Almost surely, 2^1020445500 is an apocalyptic number.

1020445500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020445500 is an abundant number, since it is smaller than the sum of its proper divisors (1951096164).

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

1020445500 is a wasteful number, since it uses less digits than its factorization.

1020445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680319 (or 680307 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1020445500 is about 31944.4126569890. The cubic root of 1020445500 is about 1006.7692406529.

Adding to 1020445500 its reverse (55440201), we get a palindrome (1075885701).

The spelling of 1020445500 in words is "one billion, twenty million, four hundred forty-five thousand, five hundred".