398000687 has 12 divisors (see below), whose sum is σ = 468563256. Its totient is φ = 337029840.

The previous prime is 398000677. The next prime is 398000693. The reversal of 398000687 is 786000893.

It is not a de Polignac number, because 398000687 - 2⁶ = 398000623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398000677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44864 + ... + 52997.

It is an arithmetic number, because the mean of its divisors is an integer number (39046938).

Almost surely, 2^398000687 is an apocalyptic number.

398000687 is a deficient number, since it is larger than the sum of its proper divisors (70562569).

398000687 is an equidigital number, since it uses as much as digits as its factorization.

398000687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97958 (or 97951 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 398000687 is about 19949.9545613518. The cubic root of 398000687 is about 735.5766600734.

The spelling of 398000687 in words is "three hundred ninety-eight million, six hundred eighty-seven", and thus it is an aban number.