238661757 has 12 divisors (see below), whose sum is σ = 346486140. Its totient is φ = 158299008.

The previous prime is 238661737. The next prime is 238661767. The reversal of 238661757 is 757166832.

238661757 is a `hidden beast` number, since 23 + 8 + 6 + 617 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 211004676 + 27657081 = 14526^2 + 5259^2 .

It is not a de Polignac number, because 238661757 - 2¹⁰ = 238660733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238661737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65532 + ... + 69077.

It is an arithmetic number, because the mean of its divisors is an integer number (28873845).

Almost surely, 2^238661757 is an apocalyptic number.

It is an amenable number.

238661757 is a deficient number, since it is larger than the sum of its proper divisors (107824383).

238661757 is a wasteful number, since it uses less digits than its factorization.

238661757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134812 (or 134809 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 238661757 is about 15448.6814000419. The cubic root of 238661757 is about 620.2892831444.

The spelling of 238661757 in words is "two hundred thirty-eight million, six hundred sixty-one thousand, seven hundred fifty-seven".