1603121440 has 48 divisors (see below), whose sum is σ = 3789834048. Its totient is φ = 640832256.

The previous prime is 1603121423. The next prime is 1603121453. The reversal of 1603121440 is 441213061.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398479 + ... + 402481.

It is an arithmetic number, because the mean of its divisors is an integer number (78954876).

Almost surely, 2^1603121440 is an apocalyptic number.

1603121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1603121440 is an abundant number, since it is smaller than the sum of its proper divisors (2186712608).

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

1603121440 is a wasteful number, since it uses less digits than its factorization.

1603121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521 (or 6513 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1603121440 is about 40038.9989884862. The cubic root of 1603121440 is about 1170.3671966993.

The spelling of 1603121440 in words is "one billion, six hundred three million, one hundred twenty-one thousand, four hundred forty".