4238731998 has 16 divisors (see below), whose sum is σ = 9419404560. Its totient is φ = 1412910648.

The previous prime is 4238731997. The next prime is 4238732011. The reversal of 4238731998 is 8991378324.

4238731998 is a `hidden beast` number, since 4 + 238 + 7 + 319 + 98 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 78495037 = 4238731998 / (4 + 2 + 3 + 8 + 7 + 3 + 1 + 9 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4238731997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39247465 + ... + 39247572.

It is an arithmetic number, because the mean of its divisors is an integer number (588712785).

Almost surely, 2^4238731998 is an apocalyptic number.

4238731998 is an abundant number, since it is smaller than the sum of its proper divisors (5180672562).

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

4238731998 is a wasteful number, since it uses less digits than its factorization.

4238731998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78495048 (or 78495042 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 4238731998 is about 65105.5450633815. The cubic root of 4238731998 is about 1618.3731060988.

The spelling of 4238731998 in words is "four billion, two hundred thirty-eight million, seven hundred thirty-one thousand, nine hundred ninety-eight".