409385140 has 24 divisors (see below), whose sum is σ = 860362272. Its totient is φ = 163629600.

The previous prime is 409385117. The next prime is 409385147. The reversal of 409385140 is 41583904.

It is a junction number, because it is equal to n+sod(n) for n = 409385096 and 409385105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409385147) 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, 21967 + ... + 36073.

It is an arithmetic number, because the mean of its divisors is an integer number (35848428).

Almost surely, 2^409385140 is an apocalyptic number.

It is an amenable number.

409385140 is an abundant number, since it is smaller than the sum of its proper divisors (450977132).

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

409385140 is a wasteful number, since it uses less digits than its factorization.

409385140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15567 (or 15565 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 409385140 is about 20233.2681492635. The cubic root of 409385140 is about 742.5243349656.

The spelling of 409385140 in words is "four hundred nine million, three hundred eighty-five thousand, one hundred forty".