408969 has 32 divisors (see below), whose sum is σ = 708480. Its totient is φ = 233280.

The previous prime is 408959. The next prime is 408971. The reversal of 408969 is 969804.

It is not a de Polignac number, because 408969 - 2⁴ = 408953 is a prime.

It is a super-2 number, since 2×408969² = 334511285922, which contains 22 as substring.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24049 + ... + 24065.

It is an arithmetic number, because the mean of its divisors is an integer number (22140).

2⁴⁰⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

408969 is a deficient number, since it is larger than the sum of its proper divisors (299511).

408969 is an equidigital number, since it uses as much as digits as its factorization.

408969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 408969 is about 639.5068412457. The cubic root of 408969 is about 74.2272657671.

It can be divided in two parts, 40 and 8969, that added together give a palindrome (9009).

The spelling of 408969 in words is "four hundred eight thousand, nine hundred sixty-nine".