108997992 has 48 divisors (see below), whose sum is σ = 297837540. Its totient is φ = 36008448.

The previous prime is 108997981. The next prime is 108997997. The reversal of 108997992 is 299799801.

It can be written as a sum of positive squares in 2 ways, for example, as 71470116 + 37527876 = 8454^2 + 6126^2 .

It is not an unprimeable number, because it can be changed into a prime (108997997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1438 + ... + 14834.

Almost surely, 2^108997992 is an apocalyptic number.

108997992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 108997992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148918770).

108997992 is an abundant number, since it is smaller than the sum of its proper divisors (188839548).

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

108997992 is a wasteful number, since it uses less digits than its factorization.

108997992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13522 (or 13515 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 108997992 is about 10440.2103427086. The cubic root of 108997992 is about 477.6826847744.

It can be divided in two parts, 10899799 and 2, that added together give a palindrome (10899801).

The spelling of 108997992 in words is "one hundred eight million, nine hundred ninety-seven thousand, nine hundred ninety-two".