398504431 has 8 divisors (see below), whose sum is σ = 429354800. Its totient is φ = 367682112.

The previous prime is 398504419. The next prime is 398504443. The reversal of 398504431 is 134405893.

It is an interprime number because it is at equal distance from previous prime (398504419) and next prime (398504443).

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 398504431 - 2²⁷ = 264286703 is a prime.

It is a super-2 number, since 2×398504431² = 317611563053267522, which contains 22 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 (398504731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29620 + ... + 40918.

It is an arithmetic number, because the mean of its divisors is an integer number (53669350).

Almost surely, 2^398504431 is an apocalyptic number.

398504431 is a deficient number, since it is larger than the sum of its proper divisors (30850369).

398504431 is a wasteful number, since it uses less digits than its factorization.

398504431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14025.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 398504431 is about 19962.5757606577. The cubic root of 398504431 is about 735.8868656592.

The spelling of 398504431 in words is "three hundred ninety-eight million, five hundred four thousand, four hundred thirty-one".