398307385 has 16 divisors (see below), whose sum is σ = 546624000. Its totient is φ = 272938176.

The previous prime is 398307383. The next prime is 398307391. The reversal of 398307385 is 583703893.

It is a happy number.

It is not a de Polignac number, because 398307385 - 2¹ = 398307383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398307383) 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 15 ways as a sum of consecutive naturals, for example, 65296 + ... + 71134.

It is an arithmetic number, because the mean of its divisors is an integer number (34164000).

Almost surely, 2^398307385 is an apocalyptic number.

398307385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

398307385 is a deficient number, since it is larger than the sum of its proper divisors (148316615).

398307385 is a wasteful number, since it uses less digits than its factorization.

398307385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 398307385 is about 19957.6397652628. The cubic root of 398307385 is about 735.7655558667.

The spelling of 398307385 in words is "three hundred ninety-eight million, three hundred seven thousand, three hundred eighty-five".