405536109 has 32 divisors (see below), whose sum is σ = 599211648. Its totient is φ = 241920000.

The previous prime is 405536107. The next prime is 405536119. The reversal of 405536109 is 901635504.

It is a happy number.

It is not a de Polignac number, because 405536109 - 2¹ = 405536107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 405536109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405536107) 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, 936357 + ... + 936789.

It is an arithmetic number, because the mean of its divisors is an integer number (18725364).

Almost surely, 2^405536109 is an apocalyptic number.

It is an amenable number.

405536109 is a deficient number, since it is larger than the sum of its proper divisors (193675539).

405536109 is a wasteful number, since it uses less digits than its factorization.

405536109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 405536109 is about 20137.9271276862. The cubic root of 405536109 is about 740.1899372438.

The spelling of 405536109 in words is "four hundred five million, five hundred thirty-six thousand, one hundred nine".