398905886 has 8 divisors (see below), whose sum is σ = 601942320. Its totient is φ = 198258448.

The previous prime is 398905849. The next prime is 398905907. The reversal of 398905886 is 688509893.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596831 + ... + 597498.

It is an arithmetic number, because the mean of its divisors is an integer number (75242790).

Almost surely, 2^398905886 is an apocalyptic number.

398905886 is a deficient number, since it is larger than the sum of its proper divisors (203036434).

398905886 is a wasteful number, since it uses less digits than its factorization.

398905886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194498.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 398905886 is about 19972.6284199151. The cubic root of 398905886 is about 736.1338945418.

The spelling of 398905886 in words is "three hundred ninety-eight million, nine hundred five thousand, eight hundred eighty-six".