238978653 has 8 divisors (see below), whose sum is σ = 318751488. Its totient is φ = 159262464.

The previous prime is 238978651. The next prime is 238978661. The reversal of 238978653 is 356879832.

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

It is not a de Polignac number, because 238978653 - 2¹ = 238978651 is a prime.

It is a super-3 number, since 3×238978653³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 238978596 and 238978605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238978651) 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, 3076 + ... + 22077.

It is an arithmetic number, because the mean of its divisors is an integer number (39843936).

Almost surely, 2^238978653 is an apocalyptic number.

It is an amenable number.

238978653 is a deficient number, since it is larger than the sum of its proper divisors (79772835).

238978653 is a wasteful number, since it uses less digits than its factorization.

238978653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28323.

The product of its digits is 2177280, while the sum is 51.

The square root of 238978653 is about 15458.9344070023. The cubic root of 238978653 is about 620.5637025548.

The spelling of 238978653 in words is "two hundred thirty-eight million, nine hundred seventy-eight thousand, six hundred fifty-three".