992638729840 has 40 divisors (see below), whose sum is σ = 2443642994160. Its totient is φ = 373699286016.

The previous prime is 992638729811. The next prime is 992638729847. The reversal of 992638729840 is 48927836299.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992638729847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364939350 + ... + 364942069.

It is an arithmetic number, because the mean of its divisors is an integer number (61091074854).

Almost surely, 2^992638729840 is an apocalyptic number.

It is an amenable number.

992638729840 is an abundant number, since it is smaller than the sum of its proper divisors (1451004264320).

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

992638729840 is a wasteful number, since it uses less digits than its factorization.

992638729840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729881449 (or 729881443 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 992638729840 in words is "nine hundred ninety-two billion, six hundred thirty-eight million, seven hundred twenty-nine thousand, eight hundred forty".