398480686 has 4 divisors (see below), whose sum is σ = 597721032. Its totient is φ = 199240342.

The previous prime is 398480657. The next prime is 398480717. The reversal of 398480686 is 686084893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686084893 = 13 ⋅52775761.

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, 99620170 + ... + 99620173.

It is an arithmetic number, because the mean of its divisors is an integer number (149430258).

Almost surely, 2^398480686 is an apocalyptic number.

398480686 is a deficient number, since it is larger than the sum of its proper divisors (199240346).

398480686 is a wasteful number, since it uses less digits than its factorization.

398480686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199240345.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 398480686 is about 19961.9810139174. The cubic root of 398480686 is about 735.8722493594.

The spelling of 398480686 in words is "three hundred ninety-eight million, four hundred eighty thousand, six hundred eighty-six".