238645745 has 48 divisors (see below), whose sum is σ = 337964400. Its totient is φ = 161021952.

The previous prime is 238645739. The next prime is 238645763. The reversal of 238645745 is 547546832.

It can be written as a sum of positive squares in 24 ways, for example, as 126540001 + 112105744 = 11249^2 + 10588^2 .

It is not a de Polignac number, because 238645745 - 2¹⁸ = 238383601 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 238645696 and 238645705.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 531281 + ... + 531729.

It is an arithmetic number, because the mean of its divisors is an integer number (7040925).

Almost surely, 2^238645745 is an apocalyptic number.

It is an amenable number.

238645745 is a deficient number, since it is larger than the sum of its proper divisors (99318655).

238645745 is a wasteful number, since it uses less digits than its factorization.

238645745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 521 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The square root of 238645745 is about 15448.1631594180. The cubic root of 238645745 is about 620.2754109399.

The spelling of 238645745 in words is "two hundred thirty-eight million, six hundred forty-five thousand, seven hundred forty-five".