1979670 has 64 divisors (see below), whose sum is σ = 5930496. Its totient is φ = 410880.

The previous prime is 1979617. The next prime is 1979683. The reversal of 1979670 is 769791.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1882 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (92664).

2^1979670 is an apocalyptic number.

1979670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2965248).

1979670 is an abundant number, since it is smaller than the sum of its proper divisors (3950826).

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

1979670 is a wasteful number, since it uses less digits than its factorization.

1979670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 1979670 is about 1407.0074626668. The cubic root of 1979670 is about 125.5637470255.

The spelling of 1979670 in words is "one million, nine hundred seventy-nine thousand, six hundred seventy".