408641 has 8 divisors (see below), whose sum is σ = 432960. Its totient is φ = 384912.

The previous prime is 408637. The next prime is 408643. The reversal of 408641 is 146804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 408641 - 2² = 408637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (408643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2426 + ... + 2588.

It is an arithmetic number, because the mean of its divisors is an integer number (54120).

2⁴⁰⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

408641 is a deficient number, since it is larger than the sum of its proper divisors (24319).

408641 is a wasteful number, since it uses less digits than its factorization.

408641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 408641 is about 639.2503421978. The cubic root of 408641 is about 74.2074166222.

The spelling of 408641 in words is "four hundred eight thousand, six hundred forty-one".