1998975004 has 12 divisors (see below), whose sum is σ = 3767299144. Its totient is φ = 922603824.

The previous prime is 1998974993. The next prime is 1998975007. The reversal of 1998975004 is 4005798991.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 38441827 = 1998975004 / (1 + 9 + 9 + 8 + 9 + 7 + 5 + 0 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998975007) 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, 19220862 + ... + 19220965.

Almost surely, 2^1998975004 is an apocalyptic number.

It is an amenable number.

1998975004 is a deficient number, since it is larger than the sum of its proper divisors (1768324140).

1998975004 is a wasteful number, since it uses less digits than its factorization.

1998975004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38441844 (or 38441842 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 1998975004 is about 44709.8982776745. The cubic root of 1998975004 is about 1259.7057774424.

The spelling of 1998975004 in words is "one billion, nine hundred ninety-eight million, nine hundred seventy-five thousand, four".