1979420180 has 12 divisors (see below), whose sum is σ = 4156782420. Its totient is φ = 791768064.

The previous prime is 1979420111. The next prime is 1979420213. The reversal of 1979420180 is 810249791.

It can be written as a sum of positive squares in 2 ways, for example, as 550277764 + 1429142416 = 23458^2 + 37804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49485485 + ... + 49485524.

It is an arithmetic number, because the mean of its divisors is an integer number (346398535).

Almost surely, 2^1979420180 is an apocalyptic number.

1979420180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979420180 is an abundant number, since it is smaller than the sum of its proper divisors (2177362240).

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

1979420180 is a wasteful number, since it uses less digits than its factorization.

1979420180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98971018 (or 98971016 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1979420180 is about 44490.6752027883. The cubic root of 1979420180 is about 1255.5846505848.

The spelling of 1979420180 in words is "one billion, nine hundred seventy-nine million, four hundred twenty thousand, one hundred eighty".