408831 has 4 divisors (see below), whose sum is σ = 545112. Its totient is φ = 272552.

The previous prime is 408817. The next prime is 408841. The reversal of 408831 is 138804.

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 408831 - 2⁷ = 408703 is a prime.

It is a super-2 number, since 2×408831² = 334285573122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

408831 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68136 + ... + 68141.

It is an arithmetic number, because the mean of its divisors is an integer number (136278).

2⁴⁰⁸⁸³¹ is an apocalyptic number.

408831 is a deficient number, since it is larger than the sum of its proper divisors (136281).

408831 is a wasteful number, since it uses less digits than its factorization.

408831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136280.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 408831 is about 639.3989365021. The cubic root of 408831 is about 74.2189158962.

The spelling of 408831 in words is "four hundred eight thousand, eight hundred thirty-one".