1998742032 has 60 divisors (see below), whose sum is σ = 6392805120. Its totient is φ = 571068864.

The previous prime is 1998742013. The next prime is 1998742049. The reversal of 1998742032 is 2302478991.

1998742032 is a `hidden beast` number, since 199 + 8 + 7 + 420 + 32 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 990432 + ... + 992447.

It is an arithmetic number, because the mean of its divisors is an integer number (106546752).

Almost surely, 2^1998742032 is an apocalyptic number.

1998742032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1998742032 is an abundant number, since it is smaller than the sum of its proper divisors (4394063088).

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

1998742032 is a wasteful number, since it uses less digits than its factorization.

1998742032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982900 (or 1982891 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1998742032 is about 44707.2928279045. The cubic root of 1998742032 is about 1259.6568377648.

The spelling of 1998742032 in words is "one billion, nine hundred ninety-eight million, seven hundred forty-two thousand, thirty-two".