406400027 has 8 divisors (see below), whose sum is σ = 447917232. Its totient is φ = 365644800.

The previous prime is 406400003. The next prime is 406400047. The reversal of 406400027 is 720004604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406400027 - 2²⁴ = 389622811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406399975 and 406400011.

It is not an unprimeable number, because it can be changed into a prime (406400047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189374 + ... + 191507.

It is an arithmetic number, because the mean of its divisors is an integer number (55989654).

Almost surely, 2^406400027 is an apocalyptic number.

406400027 is a deficient number, since it is larger than the sum of its proper divisors (41517205).

406400027 is a wasteful number, since it uses less digits than its factorization.

406400027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380989.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 406400027 is about 20159.3657390306. The cubic root of 406400027 is about 740.7151760140.

The spelling of 406400027 in words is "four hundred six million, four hundred thousand, twenty-seven".