2198430287820 has 72 divisors (see below), whose sum is σ = 7181538947856. Its totient is φ = 541152070272.

The previous prime is 2198430287797. The next prime is 2198430287887. The reversal of 2198430287820 is 287820348912.

2198430287820 is a `hidden beast` number, since 21 + 98 + 430 + 2 + 87 + 8 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469747722 + ... + 469752401.

It is an arithmetic number, because the mean of its divisors is an integer number (99743596498).

Almost surely, 2^{2198430287820} is an apocalyptic number.

2198430287820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2198430287820 is an abundant number, since it is smaller than the sum of its proper divisors (4983108660036).

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

2198430287820 is a wasteful number, since it uses less digits than its factorization.

2198430287820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939500151 (or 939500146 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 2198430287820 in words is "two trillion, one hundred ninety-eight billion, four hundred thirty million, two hundred eighty-seven thousand, eight hundred twenty".