1598440 has 32 divisors (see below), whose sum is σ = 3645000. Its totient is φ = 630784.

The previous prime is 1598381. The next prime is 1598447. The reversal of 1598440 is 448951.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1127844 + 470596 = 1062^2 + 686^2 .

It is not an unprimeable number, because it can be changed into a prime (1598447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3336 + ... + 3784.

2^1598440 is an apocalyptic number.

1598440 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 1598440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822500).

1598440 is an abundant number, since it is smaller than the sum of its proper divisors (2046560).

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

1598440 is a wasteful number, since it uses less digits than its factorization.

1598440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1598440 is about 1264.2942695433. The cubic root of 1598440 is about 116.9226849372.

The spelling of 1598440 in words is "one million, five hundred ninety-eight thousand, four hundred forty".