408406471 has 4 divisors (see below), whose sum is σ = 445534344. Its totient is φ = 371278600.

The previous prime is 408406459. The next prime is 408406477. The reversal of 408406471 is 174604804.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 408406471 - 2¹³ = 408398279 is a prime.

It is a super-3 number, since 3×408406471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408406477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18563920 + ... + 18563941.

It is an arithmetic number, because the mean of its divisors is an integer number (111383586).

Almost surely, 2^408406471 is an apocalyptic number.

408406471 is a deficient number, since it is larger than the sum of its proper divisors (37127873).

408406471 is a wasteful number, since it uses less digits than its factorization.

408406471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37127872.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 408406471 is about 20209.0690285327. The cubic root of 408406471 is about 741.9321742552.

The spelling of 408406471 in words is "four hundred eight million, four hundred six thousand, four hundred seventy-one".