405980827 has 6 divisors (see below), whose sum is σ = 472263468. Its totient is φ = 347983524.

The previous prime is 405980819. The next prime is 405980851. The reversal of 405980827 is 728089504.

It is not a de Polignac number, because 405980827 - 2³ = 405980819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405980027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4142613 + ... + 4142710.

It is an arithmetic number, because the mean of its divisors is an integer number (78710578).

Almost surely, 2^405980827 is an apocalyptic number.

405980827 is a deficient number, since it is larger than the sum of its proper divisors (66282641).

405980827 is an equidigital number, since it uses as much as digits as its factorization.

405980827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8285337 (or 8285330 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 405980827 is about 20148.9659039862. The cubic root of 405980827 is about 740.4604068171.

The spelling of 405980827 in words is "four hundred five million, nine hundred eighty thousand, eight hundred twenty-seven".