1089616 has 40 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 480000.

The previous prime is 1089611. The next prime is 1089629. The reversal of 1089616 is 6169801.

1089616 = T₁₁ + T₁₂ + ... + T₁₈₆.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7141 + ... + 7291.

2^1089616 is an apocalyptic number.

1089616 is a gapful number since it is divisible by the number (16) 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 1089616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187424).

1089616 is an abundant number, since it is smaller than the sum of its proper divisors (1285232).

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

1089616 is a wasteful number, since it uses less digits than its factorization.

1089616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1089616 is about 1043.8467320445. The cubic root of 1089616 is about 102.9021598949.

The spelling of 1089616 in words is "one million, eighty-nine thousand, six hundred sixteen".