1689725448 has 40 divisors (see below), whose sum is σ = 4732797630. Its totient is φ = 563241600.

The previous prime is 1689725447. The next prime is 1689725467. The reversal of 1689725448 is 8445279861.

It is a happy number.

1689725448 is a `hidden beast` number, since 1 + 6 + 8 + 97 + 2 + 544 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1471336164 + 218389284 = 38358^2 + 14778^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1689725394 and 1689725403.

It is not an unprimeable number, because it can be changed into a prime (1689725441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1303153 + ... + 1304448.

Almost surely, 2^1689725448 is an apocalyptic number.

1689725448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1689725448 is an abundant number, since it is smaller than the sum of its proper divisors (3043072182).

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

1689725448 is a wasteful number, since it uses less digits than its factorization.

1689725448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607619 (or 2607606 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 1689725448 is about 41106.2701786479. The cubic root of 1689725448 is about 1191.0739188556.

The spelling of 1689725448 in words is "one billion, six hundred eighty-nine million, seven hundred twenty-five thousand, four hundred forty-eight".