238728136 has 16 divisors (see below), whose sum is σ = 454954140. Its totient is φ = 117407040.

The previous prime is 238728097. The next prime is 238728137. The reversal of 238728136 is 631827832.

It can be written as a sum of positive squares in 2 ways, for example, as 156100036 + 82628100 = 12494^2 + 9090^2 .

It is a super-2 number, since 2×238728136² = 113982245836068992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238728137) 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, 244111 + ... + 245086.

Almost surely, 2^238728136 is an apocalyptic number.

It is an amenable number.

238728136 is a deficient number, since it is larger than the sum of its proper divisors (216226004).

238728136 is a wasteful number, since it uses less digits than its factorization.

238728136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489264 (or 489260 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 238728136 is about 15450.8296217388. The cubic root of 238728136 is about 620.3467848380.

The spelling of 238728136 in words is "two hundred thirty-eight million, seven hundred twenty-eight thousand, one hundred thirty-six".