38405505 has 8 divisors (see below), whose sum is σ = 61448832. Its totient is φ = 20482928.

The previous prime is 38405489. The next prime is 38405527. The reversal of 38405505 is 50550483.

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 38405505 - 2⁴ = 38405489 is a prime.

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, 1280169 + ... + 1280198.

It is an arithmetic number, because the mean of its divisors is an integer number (7681104).

Almost surely, 2^38405505 is an apocalyptic number.

It is an amenable number.

38405505 is a deficient number, since it is larger than the sum of its proper divisors (23043327).

38405505 is a wasteful number, since it uses less digits than its factorization.

38405505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560375.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 38405505 is about 6197.2175207911. The cubic root of 38405505 is about 337.3891872143.

Adding to 38405505 its reverse (50550483), we get a palindrome (88955988).

The spelling of 38405505 in words is "thirty-eight million, four hundred five thousand, five hundred five".