409402881 has 12 divisors (see below), whose sum is σ = 592580352. Its totient is φ = 272371896.

The previous prime is 409402859. The next prime is 409402901. The reversal of 409402881 is 188204904.

It is not a de Polignac number, because 409402881 - 2¹¹ = 409400833 is a prime.

It is a super-2 number, since 2×409402881² = 335221437942200322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (409402811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42321 + ... + 51086.

It is an arithmetic number, because the mean of its divisors is an integer number (49381696).

Almost surely, 2^409402881 is an apocalyptic number.

It is an amenable number.

409402881 is a deficient number, since it is larger than the sum of its proper divisors (183177471).

409402881 is a wasteful number, since it uses less digits than its factorization.

409402881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93900 (or 93897 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 409402881 is about 20233.7065561404. The cubic root of 409402881 is about 742.5350607530.

The spelling of 409402881 in words is "four hundred nine million, four hundred two thousand, eight hundred eighty-one".