538405 has 8 divisors (see below), whose sum is σ = 738432. Its totient is φ = 369168.

The previous prime is 538399. The next prime is 538411. The reversal of 538405 is 504835.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (538399) and next prime (538411).

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 538405 - 2³ = 538397 is a prime.

It is a Duffinian number.

538405 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 538405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7657 + ... + 7726.

It is an arithmetic number, because the mean of its divisors is an integer number (92304).

2⁵³⁸⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

538405 is a deficient number, since it is larger than the sum of its proper divisors (200027).

538405 is a wasteful number, since it uses less digits than its factorization.

538405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15395.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 538405 is about 733.7608602263. The cubic root of 538405 is about 81.3522735758.

The spelling of 538405 in words is "five hundred thirty-eight thousand, four hundred five".