238778643 has 8 divisors (see below), whose sum is σ = 335128000. Its totient is φ = 150807528.

The previous prime is 238778599. The next prime is 238778677. The reversal of 238778643 is 346877832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 238778643 - 2¹³ = 238770451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238778592 and 238778601.

It is not an unprimeable number, because it can be changed into a prime (238778143) 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, 2094493 + ... + 2094606.

It is an arithmetic number, because the mean of its divisors is an integer number (41891000).

Almost surely, 2^238778643 is an apocalyptic number.

238778643 is a deficient number, since it is larger than the sum of its proper divisors (96349357).

238778643 is a wasteful number, since it uses less digits than its factorization.

238778643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189121.

The product of its digits is 1354752, while the sum is 48.

The square root of 238778643 is about 15452.4639782787. The cubic root of 238778643 is about 620.3905300598.

The spelling of 238778643 in words is "two hundred thirty-eight million, seven hundred seventy-eight thousand, six hundred forty-three".