401618 has 8 divisors (see below), whose sum is σ = 688512. Its totient is φ = 172116.

The previous prime is 401593. The next prime is 401627. The reversal of 401618 is 816104.

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

It is a super-2 number, since 2×401618² = 322594035848, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 401618.

It is an unprimeable number.

401618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14330 + ... + 14357.

It is an arithmetic number, because the mean of its divisors is an integer number (86064).

2⁴⁰¹⁶¹⁸ is an apocalyptic number.

401618 is a deficient number, since it is larger than the sum of its proper divisors (286894).

401618 is a wasteful number, since it uses less digits than its factorization.

401618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28696.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 401618 is about 633.7333824251. The cubic root of 401618 is about 73.7798423708.

The spelling of 401618 in words is "four hundred one thousand, six hundred eighteen".