2198272788 has 36 divisors (see below), whose sum is σ = 5883614100. Its totient is φ = 689654016.

The previous prime is 2198272787. The next prime is 2198272801. The reversal of 2198272788 is 8872728912.

It can be written as a sum of positive squares in 2 ways, for example, as 1677885444 + 520387344 = 40962^2 + 22812^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2198272788² = 9664806500922585888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198272781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795363 + ... + 1796586.

It is an arithmetic number, because the mean of its divisors is an integer number (163433725).

Almost surely, 2^2198272788 is an apocalyptic number.

It is an amenable number.

2198272788 is an abundant number, since it is smaller than the sum of its proper divisors (3685341312).

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

2198272788 is a wasteful number, since it uses less digits than its factorization.

2198272788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591976 (or 3591971 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 2198272788 is about 46885.7418412037. The cubic root of 2198272788 is about 1300.2509945347.

The spelling of 2198272788 in words is "two billion, one hundred ninety-eight million, two hundred seventy-two thousand, seven hundred eighty-eight".