4000398 has 8 divisors (see below), whose sum is σ = 8000808. Its totient is φ = 1333464.

The previous prime is 4000379. The next prime is 4000439. The reversal of 4000398 is 8930004.

4000398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

4000398 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 333361 + ... + 333372.

It is an arithmetic number, because the mean of its divisors is an integer number (1000101).

Almost surely, 2^4000398 is an apocalyptic number.

4000398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4000398 is a wasteful number, since it uses less digits than its factorization.

4000398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666738.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 4000398 is about 2000.0994975251. The cubic root of 4000398 is about 158.7453699024.

The spelling of 4000398 in words is "four million, three hundred ninety-eight", and thus it is an aban number.