1979830 has 16 divisors (see below), whose sum is σ = 3687120. Its totient is φ = 764512.

The previous prime is 1979827. The next prime is 1979891. The reversal of 1979830 is 389791.

It is a self number, because there is not a number n which added to its sum of digits gives 1979830.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3124 + ... + 3703.

It is an arithmetic number, because the mean of its divisors is an integer number (230445).

2^1979830 is an apocalyptic number.

1979830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1979830 is a deficient number, since it is larger than the sum of its proper divisors (1707290).

1979830 is a wasteful number, since it uses less digits than its factorization.

1979830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1979830 is about 1407.0643197807. The cubic root of 1979830 is about 125.5671296866.

It can be divided in two parts, 1979 and 830, that added together give a square (2809 = 53²).

The spelling of 1979830 in words is "one million, nine hundred seventy-nine thousand, eight hundred thirty".