401398 has 4 divisors (see below), whose sum is σ = 602100. Its totient is φ = 200698.

The previous prime is 401393. The next prime is 401407. The reversal of 401398 is 893104.

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

It is a super-2 number, since 2×401398² = 322240708808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401393) by changing a digit.

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 as a sum of consecutive naturals, namely, 100348 + ... + 100351.

It is an arithmetic number, because the mean of its divisors is an integer number (150525).

2⁴⁰¹³⁹⁸ is an apocalyptic number.

401398 is a deficient number, since it is larger than the sum of its proper divisors (200702).

401398 is a wasteful number, since it uses less digits than its factorization.

401398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200701.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 401398 is about 633.5597840772. The cubic root of 401398 is about 73.7663680993.

The spelling of 401398 in words is "four hundred one thousand, three hundred ninety-eight".