538326405 has 28 divisors (see below), whose sum is σ = 968551020. Its totient is φ = 287105472.

The previous prime is 538326401. The next prime is 538326407. The reversal of 538326405 is 504623835.

It is a happy number.

538326405 is a `hidden beast` number, since 5 + 3 + 8 + 3 + 2 + 640 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68260644 + 470065761 = 8262^2 + 21681^2 .

It is not a de Polignac number, because 538326405 - 2² = 538326401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538326405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538326401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 70200 + ... + 77489.

Almost surely, 2^538326405 is an apocalyptic number.

It is an amenable number.

538326405 is a deficient number, since it is larger than the sum of its proper divisors (430224615).

538326405 is an equidigital number, since it uses as much as digits as its factorization.

538326405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147712 (or 147697 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 538326405 is about 23201.8621019952. The cubic root of 538326405 is about 813.4831485014.

The spelling of 538326405 in words is "five hundred thirty-eight million, three hundred twenty-six thousand, four hundred five".