1089868 has 12 divisors (see below), whose sum is σ = 2054080. Its totient is φ = 502992.

The previous prime is 1089863. The next prime is 1089877. The reversal of 1089868 is 8689801.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089868.

It is not an unprimeable number, because it can be changed into a prime (1089863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10428 + ... + 10531.

2^1089868 is an apocalyptic number.

It is an amenable number.

1089868 is a deficient number, since it is larger than the sum of its proper divisors (964212).

1089868 is a wasteful number, since it uses less digits than its factorization.

1089868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976 (or 20974 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1089868 is about 1043.9674324422. The cubic root of 1089868 is about 102.9100921529.

The spelling of 1089868 in words is "one million, eighty-nine thousand, eight hundred sixty-eight".