398315281 has 8 divisors (see below), whose sum is σ = 490234304. Its totient is φ = 315150480.

The previous prime is 398315279. The next prime is 398315329. The reversal of 398315281 is 182513893.

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 398315281 - 2¹ = 398315279 is a prime.

It is a super-2 number, since 2×398315281² = 317310126156217922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398315681) 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, 2188455 + ... + 2188636.

It is an arithmetic number, because the mean of its divisors is an integer number (61279288).

Almost surely, 2^398315281 is an apocalyptic number.

It is an amenable number.

398315281 is a deficient number, since it is larger than the sum of its proper divisors (91919023).

398315281 is a wasteful number, since it uses less digits than its factorization.

398315281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377111.

The product of its digits is 51840, while the sum is 40.

The square root of 398315281 is about 19957.8375832654. The cubic root of 398315281 is about 735.7704177453.

The spelling of 398315281 in words is "three hundred ninety-eight million, three hundred fifteen thousand, two hundred eighty-one".