398939145 has 16 divisors (see below), whose sum is σ = 696330432. Its totient is φ = 193424960.

The previous prime is 398939141. The next prime is 398939159. The reversal of 398939145 is 541939893.

It is a happy number.

It is not a de Polignac number, because 398939145 - 2² = 398939141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398939141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1208742 + ... + 1209071.

It is an arithmetic number, because the mean of its divisors is an integer number (43520652).

Almost surely, 2^398939145 is an apocalyptic number.

It is an amenable number.

398939145 is a deficient number, since it is larger than the sum of its proper divisors (297391287).

398939145 is a wasteful number, since it uses less digits than its factorization.

398939145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417832.

The product of its digits is 1049760, while the sum is 51.

The square root of 398939145 is about 19973.4610170596. The cubic root of 398939145 is about 736.1543524975.

It can be divided in two parts, 3989 and 39145, that added together give a palindrome (43134).

The spelling of 398939145 in words is "three hundred ninety-eight million, nine hundred thirty-nine thousand, one hundred forty-five".