409881087 has 48 divisors (see below), whose sum is σ = 762845440. Its totient is φ = 212913360.

The previous prime is 409881061. The next prime is 409881097. The reversal of 409881087 is 780188904.

It is not a de Polignac number, because 409881087 - 2¹⁹ = 409356799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409881037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13908 + ... + 31830.

Almost surely, 2^409881087 is an apocalyptic number.

409881087 is a deficient number, since it is larger than the sum of its proper divisors (352964353).

409881087 is a wasteful number, since it uses less digits than its factorization.

409881087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17961 (or 17944 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 409881087 is about 20245.5201711391. The cubic root of 409881087 is about 742.8240560795.

The spelling of 409881087 in words is "four hundred nine million, eight hundred eighty-one thousand, eighty-seven".