1689579438 has 16 divisors (see below), whose sum is σ = 3379574016. Its totient is φ = 563123960.

The previous prime is 1689579319. The next prime is 1689579473. The reversal of 1689579438 is 8349759861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67873 + ... + 89363.

It is an arithmetic number, because the mean of its divisors is an integer number (211223376).

Almost surely, 2^1689579438 is an apocalyptic number.

1689579438 is an abundant number, since it is smaller than the sum of its proper divisors (1689994578).

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

1689579438 is a wasteful number, since it uses less digits than its factorization.

1689579438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34599.

The product of its digits is 13063680, while the sum is 60.

The square root of 1689579438 is about 41104.4941338535. The cubic root of 1689579438 is about 1191.0396107747.

The spelling of 1689579438 in words is "one billion, six hundred eighty-nine million, five hundred seventy-nine thousand, four hundred thirty-eight".