1998253824 has 72 divisors (see below), whose sum is σ = 6078038400. Its totient is φ = 570928128.

The previous prime is 1998253813. The next prime is 1998253841. The reversal of 1998253824 is 4283528991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180474 + ... + 191225.

It is an arithmetic number, because the mean of its divisors is an integer number (84417200).

Almost surely, 2^1998253824 is an apocalyptic number.

1998253824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1998253824 is an abundant number, since it is smaller than the sum of its proper divisors (4079784576).

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

1998253824 is an equidigital number, since it uses as much as digits as its factorization.

1998253824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371725 (or 371711 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 1998253824 is about 44701.8324456616. The cubic root of 1998253824 is about 1259.5542691470.

The spelling of 1998253824 in words is "one billion, nine hundred ninety-eight million, two hundred fifty-three thousand, eight hundred twenty-four".