1998287612 has 12 divisors (see below), whose sum is σ = 3504972240. Its totient is φ = 996866976.

The previous prime is 1998287611. The next prime is 1998287647. The reversal of 1998287612 is 2167828991.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998287611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567233 + ... + 570744.

It is an arithmetic number, because the mean of its divisors is an integer number (292081020).

Almost surely, 2^1998287612 is an apocalyptic number.

It is an amenable number.

1998287612 is a deficient number, since it is larger than the sum of its proper divisors (1506684628).

1998287612 is a wasteful number, since it uses less digits than its factorization.

1998287612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138420 (or 1138418 counting only the distinct ones).

The product of its digits is 870912, while the sum is 53.

The square root of 1998287612 is about 44702.2103704056. The cubic root of 1998287612 is about 1259.5613682751.

The spelling of 1998287612 in words is "one billion, nine hundred ninety-eight million, two hundred eighty-seven thousand, six hundred twelve".