398767 has 4 divisors (see below), whose sum is σ = 402976. Its totient is φ = 394560.

The previous prime is 398759. The next prime is 398771. The reversal of 398767 is 767893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398767 - 2³ = 398759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398767.

It is not an unprimeable number, because it can be changed into a prime (398267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (100744).

2³⁹⁸⁷⁶⁷ is an apocalyptic number.

398767 is a deficient number, since it is larger than the sum of its proper divisors (4209).

398767 is an equidigital number, since it uses as much as digits as its factorization.

398767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208.

The product of its digits is 63504, while the sum is 40.

The square root of 398767 is about 631.4800076012. The cubic root of 398767 is about 73.6048452032.

The spelling of 398767 in words is "three hundred ninety-eight thousand, seven hundred sixty-seven".