238985129 has 8 divisors (see below), whose sum is σ = 244684488. Its totient is φ = 233343360.

The previous prime is 238985113. The next prime is 238985147. The reversal of 238985129 is 921589832.

It can be written as a sum of positive squares in 4 ways, for example, as 53290000 + 185695129 = 7300^2 + 13627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238985129 - 2⁴ = 238985113 is a prime.

It is a super-2 number, since 2×238985129² = 114227783766293282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238985179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5942 + ... + 22655.

It is an arithmetic number, because the mean of its divisors is an integer number (30585561).

Almost surely, 2^238985129 is an apocalyptic number.

It is an amenable number.

238985129 is a deficient number, since it is larger than the sum of its proper divisors (5699359).

238985129 is a wasteful number, since it uses less digits than its factorization.

238985129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28795.

The product of its digits is 311040, while the sum is 47.

The square root of 238985129 is about 15459.1438637461. The cubic root of 238985129 is about 620.5693079847.

The spelling of 238985129 in words is "two hundred thirty-eight million, nine hundred eighty-five thousand, one hundred twenty-nine".