1989188352 has 54 divisors (see below), whose sum is σ = 5735327052. Its totient is φ = 663062016.

The previous prime is 1989188347. The next prime is 1989188401. The reversal of 1989188352 is 2538819891.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 429378 + ... + 433985.

Almost surely, 2^1989188352 is an apocalyptic number.

1989188352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1989188352 is an abundant number, since it is smaller than the sum of its proper divisors (3746138700).

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

1989188352 is an equidigital number, since it uses as much as digits as its factorization.

1989188352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863385 (or 863368 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 1989188352 is about 44600.3178464011. The cubic root of 1989188352 is about 1257.6466427935.

The spelling of 1989188352 in words is "one billion, nine hundred eighty-nine million, one hundred eighty-eight thousand, three hundred fifty-two".