1879820 has 24 divisors (see below), whose sum is σ = 3976224. Its totient is φ = 746496.

The previous prime is 1879817. The next prime is 1879847. The reversal of 1879820 is 289781.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 3617 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (165676).

2^1879820 is an apocalyptic number.

1879820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1879820 is an abundant number, since it is smaller than the sum of its proper divisors (2096404).

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

1879820 is a wasteful number, since it uses less digits than its factorization.

1879820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1879820 is about 1371.0652792628. The cubic root of 1879820 is about 123.4161767899.

The spelling of 1879820 in words is "one million, eight hundred seventy-nine thousand, eight hundred twenty".