1089398 has 4 divisors (see below), whose sum is σ = 1634100. Its totient is φ = 544698.

The previous prime is 1089397. The next prime is 1089401. The reversal of 1089398 is 8939801.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272348 + ... + 272351.

It is an arithmetic number, because the mean of its divisors is an integer number (408525).

2^1089398 is an apocalyptic number.

1089398 is a deficient number, since it is larger than the sum of its proper divisors (544702).

1089398 is an equidigital number, since it uses as much as digits as its factorization.

1089398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544701.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1089398 is about 1043.7423053609. The cubic root of 1089398 is about 102.8952968756.

The spelling of 1089398 in words is "one million, eighty-nine thousand, three hundred ninety-eight".