409620 has 24 divisors (see below), whose sum is σ = 1147104. Its totient is φ = 109216.

The previous prime is 409609. The next prime is 409639. The reversal of 409620 is 26904.

409620 = T₃₁₆ + T₃₁₇ + ... + T₃₂₃.

It is a congruent number.

It is an unprimeable number.

409620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3354 + ... + 3473.

It is an arithmetic number, because the mean of its divisors is an integer number (47796).

2⁴⁰⁹⁶²⁰ is an apocalyptic number.

It is an amenable number.

409620 is an abundant number, since it is smaller than the sum of its proper divisors (737484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

409620 is a wasteful number, since it uses less digits than its factorization.

409620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839 (or 6837 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 409620 is about 640.0156248093. The cubic root of 409620 is about 74.2666300652.

The spelling of 409620 in words is "four hundred nine thousand, six hundred twenty".