1979220 has 24 divisors (see below), whose sum is σ = 5541984. Its totient is φ = 527776.

The previous prime is 1979209. The next prime is 1979227. The reversal of 1979220 is 229791.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979227) by changing a digit.

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, 16434 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (230916).

2^1979220 is an apocalyptic number.

1979220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979220 is an abundant number, since it is smaller than the sum of its proper divisors (3562764).

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

1979220 is a wasteful number, since it uses less digits than its factorization.

1979220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32999 (or 32997 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1979220 is about 1406.8475397142. The cubic root of 1979220 is about 125.5542323138.

The spelling of 1979220 in words is "one million, nine hundred seventy-nine thousand, two hundred twenty".