238402081 has 4 divisors (see below), whose sum is σ = 238458132. Its totient is φ = 238346032.

The previous prime is 238402037. The next prime is 238402093. The reversal of 238402081 is 180204832.

238402081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70829056 + 167573025 = 8416^2 + 12945^2 .

It is a cyclic number.

It is not a de Polignac number, because 238402081 - 2¹¹ = 238400033 is a prime.

It is a super-2 number, since 2×238402081² = 113671104450261122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238402181) 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, 21070 + ... + 30343.

It is an arithmetic number, because the mean of its divisors is an integer number (59614533).

Almost surely, 2^238402081 is an apocalyptic number.

It is an amenable number.

238402081 is a deficient number, since it is larger than the sum of its proper divisors (56051).

238402081 is an equidigital number, since it uses as much as digits as its factorization.

238402081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56050.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 238402081 is about 15440.2746413398. The cubic root of 238402081 is about 620.0642328526.

It can be divided in two parts, 23840 and 2081, that added together give a square (25921 = 161²).

The spelling of 238402081 in words is "two hundred thirty-eight million, four hundred two thousand, eighty-one".