1998748590 has 32 divisors (see below), whose sum is σ = 4844498976. Its totient is φ = 527721600.

The previous prime is 1998748579. The next prime is 1998748607. The reversal of 1998748590 is 958478991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326797 + ... + 332856.

It is an arithmetic number, because the mean of its divisors is an integer number (151390593).

Almost surely, 2^1998748590 is an apocalyptic number.

1998748590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998748590 is an abundant number, since it is smaller than the sum of its proper divisors (2845750386).

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

1998748590 is a wasteful number, since it uses less digits than its factorization.

1998748590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659764.

The product of its (nonzero) digits is 6531840, while the sum is 60.

The square root of 1998748590 is about 44707.3661715830. The cubic root of 1998748590 is about 1259.6582154348.

The spelling of 1998748590 in words is "one billion, nine hundred ninety-eight million, seven hundred forty-eight thousand, five hundred ninety".