398908471 has 4 divisors (see below), whose sum is σ = 429593752. Its totient is φ = 368223192.

The previous prime is 398908469. The next prime is 398908483. The reversal of 398908471 is 174809893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398908471 - 2¹ = 398908469 is a prime.

It is a super-3 number, since 3×398908471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398908571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15342621 + ... + 15342646.

It is an arithmetic number, because the mean of its divisors is an integer number (107398438).

Almost surely, 2^398908471 is an apocalyptic number.

398908471 is a deficient number, since it is larger than the sum of its proper divisors (30685281).

398908471 is a wasteful number, since it uses less digits than its factorization.

398908471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30685280.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 398908471 is about 19972.6931333759. The cubic root of 398908471 is about 736.1354846428.

The spelling of 398908471 in words is "three hundred ninety-eight million, nine hundred eight thousand, four hundred seventy-one".