1998162307 has 8 divisors (see below), whose sum is σ = 2005163712. Its totient is φ = 1991173800.

The previous prime is 1998162281. The next prime is 1998162311. The reversal of 1998162307 is 7032618991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1998162307 - 2²³ = 1989773699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1998162367) 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, 383832 + ... + 389002.

It is an arithmetic number, because the mean of its divisors is an integer number (250645464).

Almost surely, 2^1998162307 is an apocalyptic number.

1998162307 is a deficient number, since it is larger than the sum of its proper divisors (7001405).

1998162307 is an equidigital number, since it uses as much as digits as its factorization.

1998162307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1998162307 is about 44700.8087958149. The cubic root of 1998162307 is about 1259.5350402939.

The spelling of 1998162307 in words is "one billion, nine hundred ninety-eight million, one hundred sixty-two thousand, three hundred seven".