408855969 has 6 divisors (see below), whose sum is σ = 590569746. Its totient is φ = 272570640.

The previous prime is 408855959. The next prime is 408855989. The reversal of 408855969 is 969558804.

It is a happy number.

408855969 is a `hidden beast` number, since 4 + 0 + 88 + 559 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 408848400 + 7569 = 20220^2 + 87^2 .

It is not a de Polignac number, because 408855969 - 2⁷ = 408855841 is a prime.

It is a super-2 number, since 2×408855969² = 334326406773857922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408855919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22714212 + ... + 22714229.

It is an arithmetic number, because the mean of its divisors is an integer number (98428291).

Almost surely, 2^408855969 is an apocalyptic number.

It is an amenable number.

408855969 is a deficient number, since it is larger than the sum of its proper divisors (181713777).

408855969 is a wasteful number, since it uses less digits than its factorization.

408855969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45428447 (or 45428444 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The square root of 408855969 is about 20220.1871653059. The cubic root of 408855969 is about 742.2042681750.

The spelling of 408855969 in words is "four hundred eight million, eight hundred fifty-five thousand, nine hundred sixty-nine".