405690027 has 4 divisors (see below), whose sum is σ = 540920040. Its totient is φ = 270460016.

The previous prime is 405690011. The next prime is 405690029. The reversal of 405690027 is 720096504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405690027 - 2⁴ = 405690011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405690027.

It is not an unprimeable number, because it can be changed into a prime (405690029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67615002 + ... + 67615007.

It is an arithmetic number, because the mean of its divisors is an integer number (135230010).

Almost surely, 2^405690027 is an apocalyptic number.

405690027 is a deficient number, since it is larger than the sum of its proper divisors (135230013).

405690027 is a wasteful number, since it uses less digits than its factorization.

405690027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135230012.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 405690027 is about 20141.7483600605. The cubic root of 405690027 is about 740.2835697973.

The spelling of 405690027 in words is "four hundred five million, six hundred ninety thousand, twenty-seven".