408890 has 16 divisors (see below), whose sum is σ = 760320. Its totient is φ = 158160.

The previous prime is 408869. The next prime is 408911. The reversal of 408890 is 98804.

It is an interprime number because it is at equal distance from previous prime (408869) and next prime (408911).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 969.

It is an arithmetic number, because the mean of its divisors is an integer number (47520).

2⁴⁰⁸⁸⁹⁰ is an apocalyptic number.

408890 is a deficient number, since it is larger than the sum of its proper divisors (351430).

408890 is a wasteful number, since it uses less digits than its factorization.

408890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 408890 is about 639.4450719178. The cubic root of 408890 is about 74.2224859985. Note that the first 3 decimals are identical.

The spelling of 408890 in words is "four hundred eight thousand, eight hundred ninety".