2239857780 has 96 divisors (see below), whose sum is σ = 6749568000. Its totient is φ = 552929280.

The previous prime is 2239857773. The next prime is 2239857791. The reversal of 2239857780 is 877589322.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 44221 + ... + 80219.

It is an arithmetic number, because the mean of its divisors is an integer number (70308000).

Almost surely, 2^2239857780 is an apocalyptic number.

2239857780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2239857780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3374784000).

2239857780 is an abundant number, since it is smaller than the sum of its proper divisors (4509710220).

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

2239857780 is a wasteful number, since it uses less digits than its factorization.

2239857780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36089 (or 36087 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 2239857780 is about 47327.1357679714. The cubic root of 2239857780 is about 1308.3988323554.

The spelling of 2239857780 in words is "two billion, two hundred thirty-nine million, eight hundred fifty-seven thousand, seven hundred eighty".