238978489 has 8 divisors (see below), whose sum is σ = 241262912. Its totient is φ = 236703600.

The previous prime is 238978457. The next prime is 238978513. The reversal of 238978489 is 984879832.

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 238978489 - 2⁵ = 238978457 is a prime.

It is a super-2 number, since 2×238978489² = 114221436409446242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238978189) 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, 54202 + ... + 58444.

It is an arithmetic number, because the mean of its divisors is an integer number (30157864).

Almost surely, 2^238978489 is an apocalyptic number.

It is an amenable number.

238978489 is a deficient number, since it is larger than the sum of its proper divisors (2284423).

238978489 is a wasteful number, since it uses less digits than its factorization.

238978489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767.

The product of its digits is 6967296, while the sum is 58.

The square root of 238978489 is about 15458.9291026254. The cubic root of 238978489 is about 620.5635606001.

The spelling of 238978489 in words is "two hundred thirty-eight million, nine hundred seventy-eight thousand, four hundred eighty-nine".