398351667 has 16 divisors (see below), whose sum is σ = 642719232. Its totient is φ = 214239360.

The previous prime is 398351623. The next prime is 398351669. The reversal of 398351667 is 766153893.

It is a happy number.

It is not a de Polignac number, because 398351667 - 2²² = 394157363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398351669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557559 + ... + 558272.

It is an arithmetic number, because the mean of its divisors is an integer number (40169952).

Almost surely, 2^398351667 is an apocalyptic number.

398351667 is a deficient number, since it is larger than the sum of its proper divisors (244367565).

398351667 is a wasteful number, since it uses less digits than its factorization.

398351667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115858.

The product of its digits is 816480, while the sum is 48.

The square root of 398351667 is about 19958.7491341517. The cubic root of 398351667 is about 735.7928212102.

The spelling of 398351667 in words is "three hundred ninety-eight million, three hundred fifty-one thousand, six hundred sixty-seven".