1089420 has 48 divisors (see below), whose sum is σ = 3107328. Its totient is φ = 285120.

The previous prime is 1089401. The next prime is 1089421. The reversal of 1089420 is 249801.

It is not an unprimeable number, because it can be changed into a prime (1089421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3885 + ... + 4155.

It is an arithmetic number, because the mean of its divisors is an integer number (64736).

2^1089420 is an apocalyptic number.

1089420 is a gapful number since it is divisible by the number (10) 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 1089420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553664).

1089420 is an abundant number, since it is smaller than the sum of its proper divisors (2017908).

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

1089420 is a wasteful number, since it uses less digits than its factorization.

1089420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1089420 is about 1043.7528443075. The cubic root of 1089420 is about 102.8959895154.

The spelling of 1089420 in words is "one million, eighty-nine thousand, four hundred twenty".