991942048 has 24 divisors (see below), whose sum is σ = 1955685060. Its totient is φ = 495260160.

The previous prime is 991942033. The next prime is 991942057. The reversal of 991942048 is 840249199.

It can be written as a sum of positive squares in 2 ways, for example, as 980190864 + 11751184 = 31308^2 + 3428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 991941989 and 991942007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828 + ... + 44548.

Almost surely, 2^991942048 is an apocalyptic number.

It is an amenable number.

991942048 is a deficient number, since it is larger than the sum of its proper divisors (963743012).

991942048 is a wasteful number, since it uses less digits than its factorization.

991942048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44440 (or 44432 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 991942048 is about 31495.1114936906. Note that the first 3 decimals coincide. The cubic root of 991942048 is about 997.3067690187.

The spelling of 991942048 in words is "nine hundred ninety-one million, nine hundred forty-two thousand, forty-eight".