238723155 has 48 divisors (see below), whose sum is σ = 452874240. Its totient is φ = 115368000.

The previous prime is 238723151. The next prime is 238723159. The reversal of 238723155 is 551327832.

238723155 = T₂₉₆ + T₂₉₇ + ... + T₁₁₃₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (238723151) and next prime (238723159).

It is not a de Polignac number, because 238723155 - 2² = 238723151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238723151) 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 47 ways as a sum of consecutive naturals, for example, 206830 + ... + 207980.

It is an arithmetic number, because the mean of its divisors is an integer number (9434880).

Almost surely, 2^238723155 is an apocalyptic number.

238723155 is a deficient number, since it is larger than the sum of its proper divisors (214151085).

238723155 is a wasteful number, since it uses less digits than its factorization.

238723155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1589 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 238723155 is about 15450.6684321423. The cubic root of 238723155 is about 620.3424703503.

The spelling of 238723155 in words is "two hundred thirty-eight million, seven hundred twenty-three thousand, one hundred fifty-five".