1680271904 has 24 divisors (see below), whose sum is σ = 3309326748. Its totient is φ = 839808000.

The previous prime is 1680271867. The next prime is 1680271907. The reversal of 1680271904 is 4091720861.

It can be written as a sum of positive squares in 2 ways, for example, as 1485948304 + 194323600 = 38548^2 + 13940^2 .

It is not an unprimeable number, because it can be changed into a prime (1680271907) 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, 87284 + ... + 104780.

Almost surely, 2^1680271904 is an apocalyptic number.

It is an amenable number.

1680271904 is a deficient number, since it is larger than the sum of its proper divisors (1629054844).

1680271904 is a wasteful number, since it uses less digits than its factorization.

1680271904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20508 (or 20500 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1680271904 is about 40991.1198188095. The cubic root of 1680271904 is about 1188.8485210674.

The spelling of 1680271904 in words is "one billion, six hundred eighty million, two hundred seventy-one thousand, nine hundred four".