1023980805 has 32 divisors (see below), whose sum is σ = 1927497600. Its totient is φ = 513997056.

The previous prime is 1023980759. The next prime is 1023980819. The reversal of 1023980805 is 5080893201.

It is not a de Polignac number, because 1023980805 - 2⁸ = 1023980549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023980805.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 220795 + ... + 225384.

It is an arithmetic number, because the mean of its divisors is an integer number (60234300).

Almost surely, 2^1023980805 is an apocalyptic number.

1023980805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023980805 is a deficient number, since it is larger than the sum of its proper divisors (903516795).

1023980805 is a wasteful number, since it uses less digits than its factorization.

1023980805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446210 (or 446204 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1023980805 is about 31999.7000767195. The cubic root of 1023980805 is about 1007.9305419118.

The spelling of 1023980805 in words is "one billion, twenty-three million, nine hundred eighty thousand, eight hundred five".