398368187 has 6 divisors (see below), whose sum is σ = 463407948. Its totient is φ = 341458404.

The previous prime is 398368163. The next prime is 398368199. The reversal of 398368187 is 781863893.

It is not a de Polignac number, because 398368187 - 2¹⁰ = 398367163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398368147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4064933 + ... + 4065030.

It is an arithmetic number, because the mean of its divisors is an integer number (77234658).

Almost surely, 2^398368187 is an apocalyptic number.

398368187 is a deficient number, since it is larger than the sum of its proper divisors (65039761).

398368187 is an equidigital number, since it uses as much as digits as its factorization.

398368187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8129977 (or 8129970 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 398368187 is about 19959.1629834520. The cubic root of 398368187 is about 735.8029923984.

The spelling of 398368187 in words is "three hundred ninety-eight million, three hundred sixty-eight thousand, one hundred eighty-seven".