1998548040 has 32 divisors (see below), whose sum is σ = 5995644480. Its totient is φ = 532946112.

The previous prime is 1998547997. The next prime is 1998548047. The reversal of 1998548040 is 408458991.

It is not an unprimeable number, because it can be changed into a prime (1998548047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8327164 + ... + 8327403.

It is an arithmetic number, because the mean of its divisors is an integer number (187363890).

Almost surely, 2^1998548040 is an apocalyptic number.

1998548040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1998548040 is an abundant number, since it is smaller than the sum of its proper divisors (3997096440).

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

1998548040 is a wasteful number, since it uses less digits than its factorization.

1998548040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16654581 (or 16654577 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 1998548040 is about 44705.1231963407. The cubic root of 1998548040 is about 1259.6160835885.

The spelling of 1998548040 in words is "one billion, nine hundred ninety-eight million, five hundred forty-eight thousand, forty".