398334945 has 8 divisors (see below), whose sum is σ = 637335936. Its totient is φ = 212445296.

The previous prime is 398334869. The next prime is 398334947. The reversal of 398334945 is 549433893.

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 398334945 - 2¹⁰ = 398333921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398334894 and 398334903.

It is not an unprimeable number, because it can be changed into a prime (398334947) 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, 13277817 + ... + 13277846.

It is an arithmetic number, because the mean of its divisors is an integer number (79666992).

Almost surely, 2^398334945 is an apocalyptic number.

It is an amenable number.

398334945 is a deficient number, since it is larger than the sum of its proper divisors (239000991).

398334945 is a wasteful number, since it uses less digits than its factorization.

398334945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26555671.

The product of its digits is 1399680, while the sum is 48.

The square root of 398334945 is about 19958.3302157270. The cubic root of 398334945 is about 735.7825253663.

The spelling of 398334945 in words is "three hundred ninety-eight million, three hundred thirty-four thousand, nine hundred forty-five".