1089636 has 12 divisors (see below), whose sum is σ = 2542512. Its totient is φ = 363208.

The previous prime is 1089629. The next prime is 1089653. The reversal of 1089636 is 6369801.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1089636² = 2374613224992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1089597 and 1089606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45390 + ... + 45413.

It is an arithmetic number, because the mean of its divisors is an integer number (211876).

2^1089636 is an apocalyptic number.

It is an amenable number.

1089636 is an abundant number, since it is smaller than the sum of its proper divisors (1452876).

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

1089636 is a wasteful number, since it uses less digits than its factorization.

1089636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90810 (or 90808 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1089636 is about 1043.8563119510. The cubic root of 1089636 is about 102.9027894839.

The spelling of 1089636 in words is "one million, eighty-nine thousand, six hundred thirty-six".