405268689 has 32 divisors (see below), whose sum is σ = 660751360. Its totient is φ = 215784000.

The previous prime is 405268681. The next prime is 405268711. The reversal of 405268689 is 986862504.

It is a happy number.

It is not a de Polignac number, because 405268689 - 2³ = 405268681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405268681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16014 + ... + 32664.

It is an arithmetic number, because the mean of its divisors is an integer number (20648480).

Almost surely, 2^405268689 is an apocalyptic number.

It is an amenable number.

405268689 is a deficient number, since it is larger than the sum of its proper divisors (255482671).

405268689 is a wasteful number, since it uses less digits than its factorization.

405268689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16741.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 405268689 is about 20131.2863225379. The cubic root of 405268689 is about 740.0272019463.

The spelling of 405268689 in words is "four hundred five million, two hundred sixty-eight thousand, six hundred eighty-nine".