1023445992 has 16 divisors (see below), whose sum is σ = 2558615040. Its totient is φ = 341148656.

The previous prime is 1023445991. The next prime is 1023445999. The reversal of 1023445992 is 2995443201.

It is a self number, because there is not a number n which added to its sum of digits gives 1023445992.

It is not an unprimeable number, because it can be changed into a prime (1023445991) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21321768 + ... + 21321815.

It is an arithmetic number, because the mean of its divisors is an integer number (159913440).

Almost surely, 2^1023445992 is an apocalyptic number.

1023445992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1023445992 is an abundant number, since it is smaller than the sum of its proper divisors (1535169048).

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

1023445992 is a wasteful number, since it uses less digits than its factorization.

1023445992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42643592 (or 42643588 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1023445992 is about 31991.3424538577. The cubic root of 1023445992 is about 1007.7550346403.

The spelling of 1023445992 in words is "one billion, twenty-three million, four hundred forty-five thousand, nine hundred ninety-two".