992639820 has 48 divisors (see below), whose sum is σ = 2782241280. Its totient is φ = 264432576.

The previous prime is 992639801. The next prime is 992639831. The reversal of 992639820 is 28936299.

It is a self number, because there is not a number n which added to its sum of digits gives 992639820.

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 15 ways as a sum of consecutive naturals, for example, 54379 + ... + 70301.

It is an arithmetic number, because the mean of its divisors is an integer number (57963360).

Almost surely, 2^992639820 is an apocalyptic number.

It is an amenable number.

992639820 is an abundant number, since it is smaller than the sum of its proper divisors (1789601460).

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

992639820 is a wasteful number, since it uses less digits than its factorization.

992639820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16974 (or 16972 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 992639820 is about 31506.1870114427. The cubic root of 992639820 is about 997.5405627942.

The spelling of 992639820 in words is "nine hundred ninety-two million, six hundred thirty-nine thousand, eight hundred twenty".