1603431680 has 36 divisors (see below), whose sum is σ = 3840723012. Its totient is φ = 641372160.

The previous prime is 1603431677. The next prime is 1603431689. The reversal of 1603431680 is 861343061.

It can be written as a sum of positive squares in 2 ways, for example, as 1180059904 + 423371776 = 34352^2 + 20576^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603431689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625061 + ... + 627620.

Almost surely, 2^1603431680 is an apocalyptic number.

1603431680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1603431680 is an abundant number, since it is smaller than the sum of its proper divisors (2237291332).

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

1603431680 is an equidigital number, since it uses as much as digits as its factorization.

1603431680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252702 (or 1252688 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1603431680 is about 40042.8730237979. The cubic root of 1603431680 is about 1170.4426892749.

The spelling of 1603431680 in words is "one billion, six hundred three million, four hundred thirty-one thousand, six hundred eighty".