399228481 has 8 divisors (see below), whose sum is σ = 408003840. Its totient is φ = 390464928.

The previous prime is 399228421. The next prime is 399228541. The reversal of 399228481 is 184822993.

It is an interprime number because it is at equal distance from previous prime (399228421) and next prime (399228541).

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 399228481 - 2⁷ = 399228353 is a prime.

It is a super-2 number, since 2×399228481² = 318766760083134722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399228421) 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, 122805 + ... + 126013.

It is an arithmetic number, because the mean of its divisors is an integer number (51000480).

Almost surely, 2^399228481 is an apocalyptic number.

It is an amenable number.

399228481 is a deficient number, since it is larger than the sum of its proper divisors (8775359).

399228481 is a wasteful number, since it uses less digits than its factorization.

399228481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 248832, while the sum is 46.

The square root of 399228481 is about 19980.7027153701. The cubic root of 399228481 is about 736.3322781171.

The spelling of 399228481 in words is "three hundred ninety-nine million, two hundred twenty-eight thousand, four hundred eighty-one".