398149855 has 8 divisors (see below), whose sum is σ = 477889632. Its totient is φ = 318446688.

The previous prime is 398149841. The next prime is 398149901. The reversal of 398149855 is 558941893.

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 398149855 - 2⁵ = 398149823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30049 + ... + 41221.

It is an arithmetic number, because the mean of its divisors is an integer number (59736204).

Almost surely, 2^398149855 is an apocalyptic number.

398149855 is a deficient number, since it is larger than the sum of its proper divisors (79739777).

398149855 is a wasteful number, since it uses less digits than its factorization.

398149855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18305.

The product of its digits is 1555200, while the sum is 52.

The square root of 398149855 is about 19953.6927660020. The cubic root of 398149855 is about 735.6685450020.

The spelling of 398149855 in words is "three hundred ninety-eight million, one hundred forty-nine thousand, eight hundred fifty-five".