398321870 has 8 divisors (see below), whose sum is σ = 716979384. Its totient is φ = 159328744.

The previous prime is 398321863. The next prime is 398321927. The reversal of 398321870 is 78123893.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 19916084 + ... + 19916103.

It is an arithmetic number, because the mean of its divisors is an integer number (89622423).

Almost surely, 2^398321870 is an apocalyptic number.

398321870 is a deficient number, since it is larger than the sum of its proper divisors (318657514).

398321870 is a wasteful number, since it uses less digits than its factorization.

398321870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39832194.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 398321870 is about 19958.0026555765. The cubic root of 398321870 is about 735.7744748032.

The spelling of 398321870 in words is "three hundred ninety-eight million, three hundred twenty-one thousand, eight hundred seventy".