1689424438 has 16 divisors (see below), whose sum is σ = 2745419040. Its totient is φ = 775063296.

The previous prime is 1689424427. The next prime is 1689424441. The reversal of 1689424438 is 8344249861.

It is a junction number, because it is equal to n+sod(n) for n = 1689424391 and 1689424400.

It is a congruent number.

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, 190203 + ... + 198886.

It is an arithmetic number, because the mean of its divisors is an integer number (171588690).

Almost surely, 2^1689424438 is an apocalyptic number.

1689424438 is a deficient number, since it is larger than the sum of its proper divisors (1055994602).

1689424438 is a wasteful number, since it uses less digits than its factorization.

1689424438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389271.

The product of its digits is 1327104, while the sum is 49.

The square root of 1689424438 is about 41102.6086520065. The cubic root of 1689424438 is about 1191.0031881437.

The spelling of 1689424438 in words is "one billion, six hundred eighty-nine million, four hundred twenty-four thousand, four hundred thirty-eight".