1089906 has 16 divisors (see below), whose sum is σ = 2190144. Its totient is φ = 361584.

The previous prime is 1089877. The next prime is 1089917. The reversal of 1089906 is 6099801.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (136884).

2^1089906 is an apocalyptic number.

1089906 is an abundant number, since it is smaller than the sum of its proper divisors (1100238).

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

1089906 is a wasteful number, since it uses less digits than its factorization.

1089906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1089906 is about 1043.9856320850. The cubic root of 1089906 is about 102.9112881809.

The spelling of 1089906 in words is "one million, eighty-nine thousand, nine hundred six".