398465876 has 12 divisors (see below), whose sum is σ = 716161908. Its totient is φ = 193848192.

The previous prime is 398465867. The next prime is 398465917. The reversal of 398465876 is 678564893.

It can be written as a sum of positive squares in 2 ways, for example, as 192543376 + 205922500 = 13876^2 + 14350^2 .

It is a super-3 number, since 3×398465876³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346021 + ... + 1346316.

It is an arithmetic number, because the mean of its divisors is an integer number (59680159).

Almost surely, 2^398465876 is an apocalyptic number.

It is an amenable number.

398465876 is a deficient number, since it is larger than the sum of its proper divisors (317696032).

398465876 is a wasteful number, since it uses less digits than its factorization.

398465876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692378 (or 2692376 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 56.

The square root of 398465876 is about 19961.6100553037. The cubic root of 398465876 is about 735.8631327293.

The spelling of 398465876 in words is "three hundred ninety-eight million, four hundred sixty-five thousand, eight hundred seventy-six".