1987184228 has 12 divisors (see below), whose sum is σ = 3562391532. Its totient is φ = 969358080.

The previous prime is 1987184219. The next prime is 1987184231. The reversal of 1987184228 is 8224817891.

It can be written as a sum of positive squares in 2 ways, for example, as 54878464 + 1932305764 = 7408^2 + 43958^2 .

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, 6058325 + ... + 6058652.

It is an arithmetic number, because the mean of its divisors is an integer number (296865961).

Almost surely, 2^1987184228 is an apocalyptic number.

It is an amenable number.

1987184228 is a deficient number, since it is larger than the sum of its proper divisors (1575207304).

1987184228 is a wasteful number, since it uses less digits than its factorization.

1987184228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12117022 (or 12117020 counting only the distinct ones).

The product of its digits is 516096, while the sum is 50.

The square root of 1987184228 is about 44577.8445867451. The cubic root of 1987184228 is about 1257.2241376781.

The spelling of 1987184228 in words is "one billion, nine hundred eighty-seven million, one hundred eighty-four thousand, two hundred twenty-eight".