238890 has 16 divisors (see below), whose sum is σ = 573408. Its totient is φ = 63696.

The previous prime is 238883. The next prime is 238897. The reversal of 238890 is 98832.

238890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (238883) and next prime (238897).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7963 = 238890 / (2 + 3 + 8 + 8 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (238897) 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, 3952 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (35838).

2²³⁸⁸⁹⁰ is an apocalyptic number.

238890 is an abundant number, since it is smaller than the sum of its proper divisors (334518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238890 is a wasteful number, since it uses less digits than its factorization.

238890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 238890 is about 488.7637466098. The cubic root of 238890 is about 62.0486957014.

It can be divided in two parts, 238 and 890, that added together give a triangular number (1128 = T₄₇).

The spelling of 238890 in words is "two hundred thirty-eight thousand, eight hundred ninety".