238730819 has 4 divisors (see below), whose sum is σ = 240921120. Its totient is φ = 236540520.

The previous prime is 238730773. The next prime is 238730837. The reversal of 238730819 is 918037832.

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

It is a cyclic number.

It is not a de Polignac number, because 238730819 - 2¹⁶ = 238665283 is a prime.

It is a super-2 number, since 2×238730819² = 113984807880821522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238730119) 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, 1094987 + ... + 1095204.

It is an arithmetic number, because the mean of its divisors is an integer number (60230280).

Almost surely, 2^238730819 is an apocalyptic number.

238730819 is a deficient number, since it is larger than the sum of its proper divisors (2190301).

238730819 is a wasteful number, since it uses less digits than its factorization.

238730819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190300.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 238730819 is about 15450.9164453116. The cubic root of 238730819 is about 620.3491087984.

The spelling of 238730819 in words is "two hundred thirty-eight million, seven hundred thirty thousand, eight hundred nineteen".