398170345 has 8 divisors (see below), whose sum is σ = 505910664. Its totient is φ = 299798784.

The previous prime is 398170337. The next prime is 398170373. The reversal of 398170345 is 543071893.

It can be written as a sum of positive squares in 4 ways, for example, as 20684304 + 377486041 = 4548^2 + 19429^2 .

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 398170345 - 2³ = 398170337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398170298 and 398170307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2342094 + ... + 2342263.

It is an arithmetic number, because the mean of its divisors is an integer number (63238833).

Almost surely, 2^398170345 is an apocalyptic number.

It is an amenable number.

398170345 is a deficient number, since it is larger than the sum of its proper divisors (107740319).

398170345 is a wasteful number, since it uses less digits than its factorization.

398170345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684379.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 398170345 is about 19954.2061981929. The cubic root of 398170345 is about 735.6811646976.

The spelling of 398170345 in words is "three hundred ninety-eight million, one hundred seventy thousand, three hundred forty-five".