398186494 has 8 divisors (see below), whose sum is σ = 606194568. Its totient is φ = 196121640.

The previous prime is 398186479. The next prime is 398186513. The reversal of 398186494 is 494681893.

It is a happy number.

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485637 + ... + 1485904.

It is an arithmetic number, because the mean of its divisors is an integer number (75774321).

Almost surely, 2^398186494 is an apocalyptic number.

398186494 is a deficient number, since it is larger than the sum of its proper divisors (208008074).

398186494 is a wasteful number, since it uses less digits than its factorization.

398186494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971610.

The product of its digits is 1492992, while the sum is 52.

The square root of 398186494 is about 19954.6108456166. The cubic root of 398186494 is about 735.6911104864.

The spelling of 398186494 in words is "three hundred ninety-eight million, one hundred eighty-six thousand, four hundred ninety-four".