398655996 has 12 divisors (see below), whose sum is σ = 930197352. Its totient is φ = 132885328.

The previous prime is 398655991. The next prime is 398656039. The reversal of 398655996 is 699556893.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398655991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16610655 + ... + 16610678.

It is an arithmetic number, because the mean of its divisors is an integer number (77516446).

Almost surely, 2^398655996 is an apocalyptic number.

It is an amenable number.

398655996 is an abundant number, since it is smaller than the sum of its proper divisors (531541356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398655996 is a wasteful number, since it uses less digits than its factorization.

398655996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33221340 (or 33221338 counting only the distinct ones).

The product of its digits is 15746400, while the sum is 60.

The square root of 398655996 is about 19966.3716283154. The cubic root of 398655996 is about 735.9801482319.

The spelling of 398655996 in words is "three hundred ninety-eight million, six hundred fifty-five thousand, nine hundred ninety-six".