1098320 has 20 divisors (see below), whose sum is σ = 2553780. Its totient is φ = 439296.

The previous prime is 1098313. The next prime is 1098341. The reversal of 1098320 is 238901.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 698896 = 632^2 + 836^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 6785 + ... + 6944.

It is an arithmetic number, because the mean of its divisors is an integer number (127689).

2^1098320 is an apocalyptic number.

1098320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1098320 is an abundant number, since it is smaller than the sum of its proper divisors (1455460).

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

1098320 is a wasteful number, since it uses less digits than its factorization.

1098320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13742 (or 13736 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1098320 is about 1048.0076335600. The cubic root of 1098320 is about 103.1754323267.

The spelling of 1098320 in words is "one million, ninety-eight thousand, three hundred twenty".