1998516028 has 12 divisors (see below), whose sum is σ = 3500989632. Its totient is φ = 998233280.

The previous prime is 1998516001. The next prime is 1998516041. The reversal of 1998516028 is 8206158991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251788 + ... + 259603.

It is an arithmetic number, because the mean of its divisors is an integer number (291749136).

Almost surely, 2^1998516028 is an apocalyptic number.

It is an amenable number.

1998516028 is a deficient number, since it is larger than the sum of its proper divisors (1502473604).

1998516028 is a wasteful number, since it uses less digits than its factorization.

1998516028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512372 (or 512370 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 49.

The square root of 1998516028 is about 44704.7651598798. The cubic root of 1998516028 is about 1259.6093581985.

The spelling of 1998516028 in words is "one billion, nine hundred ninety-eight million, five hundred sixteen thousand, twenty-eight".