409321620 has 48 divisors (see below), whose sum is σ = 1273446720. Its totient is φ = 109152288.

The previous prime is 409321607. The next prime is 409321663. The reversal of 409321620 is 26123904.

409321620 is a `hidden beast` number, since 4 + 0 + 9 + 32 + 1 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 378462 + ... + 379541.

It is an arithmetic number, because the mean of its divisors is an integer number (26530140).

Almost surely, 2^409321620 is an apocalyptic number.

It is an amenable number.

409321620 is an abundant number, since it is smaller than the sum of its proper divisors (864125100).

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

409321620 is a wasteful number, since it uses less digits than its factorization.

409321620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758021 (or 758013 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 409321620 is about 20231.6983963285. The cubic root of 409321620 is about 742.4859297405.

The spelling of 409321620 in words is "four hundred nine million, three hundred twenty-one thousand, six hundred twenty".