1679638 has 8 divisors (see below), whose sum is σ = 2652120. Its totient is φ = 795600.

The previous prime is 1679633. The next prime is 1679641. The reversal of 1679638 is 8369761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1679638² = 5642367622088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1679638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679633) 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, 22063 + ... + 22138.

It is an arithmetic number, because the mean of its divisors is an integer number (331515).

2^1679638 is an apocalyptic number.

1679638 is a deficient number, since it is larger than the sum of its proper divisors (972482).

1679638 is a wasteful number, since it uses less digits than its factorization.

1679638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44222.

The product of its digits is 54432, while the sum is 40.

The square root of 1679638 is about 1296.0084876265. The cubic root of 1679638 is about 118.8698999508.

The spelling of 1679638 in words is "one million, six hundred seventy-nine thousand, six hundred thirty-eight".