398647846 has 4 divisors (see below), whose sum is σ = 597971772. Its totient is φ = 199323922.

The previous prime is 398647831. The next prime is 398647877. The reversal of 398647846 is 648746893.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99661960 + ... + 99661963.

It is an arithmetic number, because the mean of its divisors is an integer number (149492943).

Almost surely, 2^398647846 is an apocalyptic number.

398647846 is a deficient number, since it is larger than the sum of its proper divisors (199323926).

398647846 is a wasteful number, since it uses less digits than its factorization.

398647846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199323925.

The product of its digits is 6967296, while the sum is 55.

The square root of 398647846 is about 19966.1675341063. The cubic root of 398647846 is about 735.9751328141.

The spelling of 398647846 in words is "three hundred ninety-eight million, six hundred forty-seven thousand, eight hundred forty-six".