238557966 has 16 divisors (see below), whose sum is σ = 478254288. Its totient is φ = 79329600.

The previous prime is 238557961. The next prime is 238557983. The reversal of 238557966 is 669755832.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238557961) 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 7 ways as a sum of consecutive naturals, for example, 44695 + ... + 49746.

It is an arithmetic number, because the mean of its divisors is an integer number (29890893).

Almost surely, 2^238557966 is an apocalyptic number.

238557966 is an abundant number, since it is smaller than the sum of its proper divisors (239696322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238557966 is a wasteful number, since it uses less digits than its factorization.

238557966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94867.

The product of its digits is 2721600, while the sum is 51.

The square root of 238557966 is about 15445.3218160063. The cubic root of 238557966 is about 620.1993514341.

The spelling of 238557966 in words is "two hundred thirty-eight million, five hundred fifty-seven thousand, nine hundred sixty-six".