1087992 has 80 divisors (see below), whose sum is σ = 3223440. Its totient is φ = 342144.

The previous prime is 1087987. The next prime is 1088023. The reversal of 1087992 is 2997801.

It is a happy number.

1087992 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14868 + ... + 14940.

It is an arithmetic number, because the mean of its divisors is an integer number (40293).

2^1087992 is an apocalyptic number.

1087992 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 1087992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611720).

1087992 is an abundant number, since it is smaller than the sum of its proper divisors (2135448).

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

1087992 is a wasteful number, since it uses less digits than its factorization.

1087992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1087992 is about 1043.0685500004. The cubic root of 1087992 is about 102.8510115393.

It can be divided in two parts, 108799 and 2, that added together give a palindrome (108801).

The spelling of 1087992 in words is "one million, eighty-seven thousand, nine hundred ninety-two".