238155885 has 24 divisors (see below), whose sum is σ = 450332064. Its totient is φ = 115469280.

The previous prime is 238155881. The next prime is 238155893. The reversal of 238155885 is 588551832.

It is not a de Polignac number, because 238155885 - 2² = 238155881 is a prime.

It is a super-3 number, since 3×238155885³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 238155885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238155881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240067 + ... + 241056.

It is an arithmetic number, because the mean of its divisors is an integer number (18763836).

Almost surely, 2^238155885 is an apocalyptic number.

It is an amenable number.

238155885 is a deficient number, since it is larger than the sum of its proper divisors (212176179).

238155885 is a wasteful number, since it uses less digits than its factorization.

238155885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481145 (or 481142 counting only the distinct ones).

The product of its digits is 384000, while the sum is 45.

The square root of 238155885 is about 15432.3000554033. The cubic root of 238155885 is about 619.8507141440.

The spelling of 238155885 in words is "two hundred thirty-eight million, one hundred fifty-five thousand, eight hundred eighty-five".