2179442780 has 12 divisors (see below), whose sum is σ = 4576829880. Its totient is φ = 871777104.

The previous prime is 2179442779. The next prime is 2179442803. The reversal of 2179442780 is 872449712.

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, 54486050 + ... + 54486089.

It is an arithmetic number, because the mean of its divisors is an integer number (381402490).

Almost surely, 2^2179442780 is an apocalyptic number.

2179442780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2179442780 is an abundant number, since it is smaller than the sum of its proper divisors (2397387100).

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

2179442780 is a wasteful number, since it uses less digits than its factorization.

2179442780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108972148 (or 108972146 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 2179442780 is about 46684.5025677687. The cubic root of 2179442780 is about 1296.5277716014.

The spelling of 2179442780 in words is "two billion, one hundred seventy-nine million, four hundred forty-two thousand, seven hundred eighty".