238640177 has 4 divisors (see below), whose sum is σ = 239568996. Its totient is φ = 237711360.

The previous prime is 238640173. The next prime is 238640221. The reversal of 238640177 is 771046832.

238640177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170015521 + 68624656 = 13039^2 + 8284^2 .

It is a cyclic number.

It is not a de Polignac number, because 238640177 - 2² = 238640173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238640177.

It is not an unprimeable number, because it can be changed into a prime (238640173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464024 + ... + 464537.

It is an arithmetic number, because the mean of its divisors is an integer number (59892249).

Almost surely, 2^238640177 is an apocalyptic number.

It is an amenable number.

238640177 is a deficient number, since it is larger than the sum of its proper divisors (928819).

238640177 is an equidigital number, since it uses as much as digits as its factorization.

238640177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928818.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 238640177 is about 15447.9829427663. The cubic root of 238640177 is about 620.2705868853.

The spelling of 238640177 in words is "two hundred thirty-eight million, six hundred forty thousand, one hundred seventy-seven".