408447387 has 16 divisors (see below), whose sum is σ = 606369280. Its totient is φ = 271730376.

The previous prime is 408447379. The next prime is 408447407. The reversal of 408447387 is 783744804.

It is not a de Polignac number, because 408447387 - 2³ = 408447379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408442387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2383 + ... + 28680.

It is an arithmetic number, because the mean of its divisors is an integer number (37898080).

Almost surely, 2^408447387 is an apocalyptic number.

408447387 is a deficient number, since it is larger than the sum of its proper divisors (197921893).

408447387 is a wasteful number, since it uses less digits than its factorization.

408447387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31559 (or 31553 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The square root of 408447387 is about 20210.0813209645. The cubic root of 408447387 is about 741.9569501303.

The spelling of 408447387 in words is "four hundred eight million, four hundred forty-seven thousand, three hundred eighty-seven".