408280869 has 24 divisors (see below), whose sum is σ = 612198912. Its totient is φ = 262012320.

The previous prime is 408280853. The next prime is 408280871. The reversal of 408280869 is 968082804.

It is a happy number.

It is not a de Polignac number, because 408280869 - 2⁴ = 408280853 is a prime.

It is a super-2 number, since 2×408280869² = 333386535982790322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408280849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17892 + ... + 33714.

It is an arithmetic number, because the mean of its divisors is an integer number (25508288).

Almost surely, 2^408280869 is an apocalyptic number.

It is an amenable number.

408280869 is a deficient number, since it is larger than the sum of its proper divisors (203918043).

408280869 is a wasteful number, since it uses less digits than its factorization.

408280869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15937 (or 15934 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 408280869 is about 20205.9612243516. The cubic root of 408280869 is about 741.8561081085.

The spelling of 408280869 in words is "four hundred eight million, two hundred eighty thousand, eight hundred sixty-nine".