238623156 has 18 divisors (see below), whose sum is σ = 603186402. Its totient is φ = 79541040.

The previous prime is 238623149. The next prime is 238623173. The reversal of 238623156 is 651326832.

It is a happy number.

238623156 is a `hidden beast` number, since 23 + 8 + 623 + 1 + 5 + 6 = 666.

238623156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 209786256 + 28836900 = 14484^2 + 5370^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6628421 = 238623156 / (2 + 3 + 8 + 6 + 2 + 3 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 238623156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3314175 + ... + 3314246.

Almost surely, 2^238623156 is an apocalyptic number.

It is an amenable number.

238623156 is an abundant number, since it is smaller than the sum of its proper divisors (364563246).

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

238623156 is a wasteful number, since it uses less digits than its factorization.

238623156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628431 (or 6628426 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 238623156 is about 15447.4320195947. The cubic root of 238623156 is about 620.2558396106.

Adding to 238623156 its reverse (651326832), we get a palindrome (889949988).

The spelling of 238623156 in words is "two hundred thirty-eight million, six hundred twenty-three thousand, one hundred fifty-six".