1998004012 has 6 divisors (see below), whose sum is σ = 3496507028. Its totient is φ = 999002004.

The previous prime is 1998004007. The next prime is 1998004037. The reversal of 1998004012 is 2104008991.

It is a super-2 number, since 2×1998004012² = 7984040063936192288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249750498 + ... + 249750505.

Almost surely, 2^1998004012 is an apocalyptic number.

It is an amenable number.

1998004012 is a deficient number, since it is larger than the sum of its proper divisors (1498503016).

1998004012 is a wasteful number, since it uses less digits than its factorization.

1998004012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499501007 (or 499501005 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1998004012 is about 44699.0381551997. The cubic root of 1998004012 is about 1259.5017791713.

The spelling of 1998004012 in words is "one billion, nine hundred ninety-eight million, four thousand, twelve".