398235945 has 16 divisors (see below), whose sum is σ = 637826112. Its totient is φ = 212176320.

The previous prime is 398235883. The next prime is 398235949. The reversal of 398235945 is 549532893.

It is not a de Polignac number, because 398235945 - 2¹⁸ = 397973801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398235894 and 398235903.

It is not an unprimeable number, because it can be changed into a prime (398235949) 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, 2314 + ... + 28316.

It is an arithmetic number, because the mean of its divisors is an integer number (39864132).

Almost surely, 2^398235945 is an apocalyptic number.

It is an amenable number.

398235945 is a deficient number, since it is larger than the sum of its proper divisors (239590167).

398235945 is a wasteful number, since it uses less digits than its factorization.

398235945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27032.

The product of its digits is 1166400, while the sum is 48.

The square root of 398235945 is about 19955.8498942040. The cubic root of 398235945 is about 735.7215645205.

The spelling of 398235945 in words is "three hundred ninety-eight million, two hundred thirty-five thousand, nine hundred forty-five".