2198538720 has 768 divisors, whose sum is σ = 9580032000. Its totient is φ = 459841536.

The previous prime is 2198538707. The next prime is 2198538721. The reversal of 2198538720 is 278358912.

It is a happy number.

2198538720 is a `hidden beast` number, since 2 + 1 + 98 + 538 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198538721) 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 127 ways as a sum of consecutive naturals, for example, 20170026 + ... + 20170134.

It is an arithmetic number, because the mean of its divisors is an integer number (12474000).

Almost surely, 2^2198538720 is an apocalyptic number.

2198538720 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 2198538720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4790016000).

2198538720 is an abundant number, since it is smaller than the sum of its proper divisors (7381493280).

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

2198538720 is a wasteful number, since it uses less digits than its factorization.

2198538720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 2198538720 is about 46888.5777135541. The cubic root of 2198538720 is about 1300.3034242433.

The spelling of 2198538720 in words is "two billion, one hundred ninety-eight million, five hundred thirty-eight thousand, seven hundred twenty".