238565305 has 16 divisors (see below), whose sum is σ = 322380288. Its totient is φ = 167904000.

The previous prime is 238565291. The next prime is 238565317. The reversal of 238565305 is 503565832.

It is not a de Polignac number, because 238565305 - 2⁹ = 238564793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68256 + ... + 71665.

It is an arithmetic number, because the mean of its divisors is an integer number (20148768).

Almost surely, 2^238565305 is an apocalyptic number.

It is an amenable number.

238565305 is a deficient number, since it is larger than the sum of its proper divisors (83814983).

238565305 is a wasteful number, since it uses less digits than its factorization.

238565305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139968.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 238565305 is about 15445.5593942078. The cubic root of 238565305 is about 620.2057113089.

It can be divided in two parts, 23856 and 5305, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 238565305 in words is "two hundred thirty-eight million, five hundred sixty-five thousand, three hundred five".