398781446 has 8 divisors (see below), whose sum is σ = 683625360. Its totient is φ = 170906328.

The previous prime is 398781419. The next prime is 398781491. The reversal of 398781446 is 644187893.

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

It is a junction number, because it is equal to n+sod(n) for n = 398781394 and 398781403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14242181 + ... + 14242208.

It is an arithmetic number, because the mean of its divisors is an integer number (85453170).

Almost surely, 2^398781446 is an apocalyptic number.

398781446 is a deficient number, since it is larger than the sum of its proper divisors (284843914).

398781446 is a wasteful number, since it uses less digits than its factorization.

398781446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28484398.

The product of its digits is 1161216, while the sum is 50.

The square root of 398781446 is about 19969.5129134388. The cubic root of 398781446 is about 736.0573401195.

The spelling of 398781446 in words is "three hundred ninety-eight million, seven hundred eighty-one thousand, four hundred forty-six".