238630405 has 64 divisors (see below), whose sum is σ = 350945280. Its totient is φ = 153964800.

The previous prime is 238630393. The next prime is 238630409. The reversal of 238630405 is 504036832.

It is not a de Polignac number, because 238630405 - 2¹⁹ = 238106117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238630409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 880420 + ... + 880690.

It is an arithmetic number, because the mean of its divisors is an integer number (5483520).

Almost surely, 2^238630405 is an apocalyptic number.

It is an amenable number.

238630405 is a deficient number, since it is larger than the sum of its proper divisors (112314875).

238630405 is a wasteful number, since it uses less digits than its factorization.

238630405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 238630405 is about 15447.6666522812. Note that the first 4 decimals coincide. The cubic root of 238630405 is about 620.2621203493.

The spelling of 238630405 in words is "two hundred thirty-eight million, six hundred thirty thousand, four hundred five".