1603980 has 144 divisors (see below), whose sum is σ = 5940480. Its totient is φ = 342144.

The previous prime is 1603963. The next prime is 1604003. The reversal of 1603980 is 893061.

It is an Ulam number.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23907 + ... + 23973.

2^1603980 is an apocalyptic number.

1603980 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 1603980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2970240).

1603980 is an abundant number, since it is smaller than the sum of its proper divisors (4336500).

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

1603980 is a wasteful number, since it uses less digits than its factorization.

1603980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1603980 is about 1266.4833200639. The cubic root of 1603980 is about 117.0576091486.

The spelling of 1603980 in words is "one million, six hundred three thousand, nine hundred eighty".