408181804 has 24 divisors (see below), whose sum is σ = 723619008. Its totient is φ = 201446400.

The previous prime is 408181801. The next prime is 408181819.

It is a happy number.

408181804 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×408181804² = 333224770233388832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 408181804.

It is not an unprimeable number, because it can be changed into a prime (408181801) 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, 146892 + ... + 149644.

It is an arithmetic number, because the mean of its divisors is an integer number (30150792).

Almost surely, 2^408181804 is an apocalyptic number.

It is an amenable number.

408181804 is a deficient number, since it is larger than the sum of its proper divisors (315437204).

408181804 is a wasteful number, since it uses less digits than its factorization.

408181804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 408181804 is about 20203.5096951000. The cubic root of 408181804 is about 741.7961020965.

The spelling of 408181804 in words is "four hundred eight million, one hundred eighty-one thousand, eight hundred four".