238311765 has 12 divisors (see below), whose sum is σ = 413073804. Its totient is φ = 127099584.

The previous prime is 238311757. The next prime is 238311769. The reversal of 238311765 is 567113832.

238311765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155301444 + 83010321 = 12462^2 + 9111^2 .

It is not a de Polignac number, because 238311765 - 2³ = 238311757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238311769) 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, 2647864 + ... + 2647953.

It is an arithmetic number, because the mean of its divisors is an integer number (34422817).

Almost surely, 2^238311765 is an apocalyptic number.

It is an amenable number.

238311765 is a deficient number, since it is larger than the sum of its proper divisors (174762039).

238311765 is a wasteful number, since it uses less digits than its factorization.

238311765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295828 (or 5295825 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 238311765 is about 15437.3496753815. The cubic root of 238311765 is about 619.9859214632.

The spelling of 238311765 in words is "two hundred thirty-eight million, three hundred eleven thousand, seven hundred sixty-five".