992628881 has 4 divisors (see below), whose sum is σ = 992784564. Its totient is φ = 992473200.

The previous prime is 992628877. The next prime is 992628893. The reversal of 992628881 is 188826299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 974438656 + 18190225 = 31216^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 992628881 - 2² = 992628877 is a prime.

It is a super-2 number, since 2×992628881² = 1970624190790624322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992628821) 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, 67850 + ... + 81171.

It is an arithmetic number, because the mean of its divisors is an integer number (248196141).

Almost surely, 2^992628881 is an apocalyptic number.

It is an amenable number.

992628881 is a deficient number, since it is larger than the sum of its proper divisors (155683).

992628881 is a wasteful number, since it uses less digits than its factorization.

992628881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155682.

The product of its digits is 995328, while the sum is 53.

The square root of 992628881 is about 31506.0134101412. The cubic root of 992628881 is about 997.5368984452.

The spelling of 992628881 in words is "nine hundred ninety-two million, six hundred twenty-eight thousand, eight hundred eighty-one".