992386881990 has 144 divisors (see below), whose sum is σ = 3104963156880. Its totient is φ = 219009490560.

The previous prime is 992386881887. The next prime is 992386882037. The reversal of 992386881990 is 99188683299.

It is a happy number.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3751956 + ... + 4007735.

It is an arithmetic number, because the mean of its divisors is an integer number (21562244145).

Almost surely, 2^992386881990 is an apocalyptic number.

992386881990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

992386881990 is an abundant number, since it is smaller than the sum of its proper divisors (2112576274890).

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

992386881990 is a wasteful number, since it uses less digits than its factorization.

992386881990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759747 (or 7759737 counting only the distinct ones).

The product of its (nonzero) digits is 120932352, while the sum is 72.

The spelling of 992386881990 in words is "nine hundred ninety-two billion, three hundred eighty-six million, eight hundred eighty-one thousand, nine hundred ninety".