265938138 has 12 divisors (see below), whose sum is σ = 576199338. Its totient is φ = 88646040.

The previous prime is 265938137. The next prime is 265938143. The reversal of 265938138 is 831839562.

It is a happy number.

265938138 is a `hidden beast` number, since 26 + 593 + 8 + 1 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 229613409 + 36324729 = 15153^2 + 6027^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 265938093 and 265938102.

It is not an unprimeable number, because it can be changed into a prime (265938137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7387153 + ... + 7387188.

Almost surely, 2^265938138 is an apocalyptic number.

265938138 is an abundant number, since it is smaller than the sum of its proper divisors (310261200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265938138 is a wasteful number, since it uses less digits than its factorization.

265938138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14774349 (or 14774346 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 265938138 is about 16307.6098187319. The cubic root of 265938138 is about 643.0728995581.

The spelling of 265938138 in words is "two hundred sixty-five million, nine hundred thirty-eight thousand, one hundred thirty-eight".