398642299 has 16 divisors (see below), whose sum is σ = 475324416. Its totient is φ = 330076800.

The previous prime is 398642281. The next prime is 398642339. The reversal of 398642299 is 992246893.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 398642299 - 2⁵ = 398642267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398642899) 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, 28587 + ... + 40180.

It is an arithmetic number, because the mean of its divisors is an integer number (29707776).

Almost surely, 2^398642299 is an apocalyptic number.

398642299 is a deficient number, since it is larger than the sum of its proper divisors (76682117).

398642299 is a wasteful number, since it uses less digits than its factorization.

398642299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68826.

The product of its digits is 1679616, while the sum is 52.

The square root of 398642299 is about 19966.0286236397. The cubic root of 398642299 is about 735.9717192140.

The spelling of 398642299 in words is "three hundred ninety-eight million, six hundred forty-two thousand, two hundred ninety-nine".