2368509138 has 18 divisors (see below), whose sum is σ = 5132217207. Its totient is φ = 789434220.

The previous prime is 2368509131. The next prime is 2368509149. The reversal of 2368509138 is 8319058632.

It is a happy number.

2368509138 is a `hidden beast` number, since 2 + 3 + 6 + 8 + 509 + 138 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1184254569 + 1184254569 = 34413^2 + 34413^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=34413.

It is a junction number, because it is equal to n+sod(n) for n = 2368509093 and 2368509102.

It is not an unprimeable number, because it can be changed into a prime (2368509131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 200743 + ... + 212213.

Almost surely, 2^2368509138 is an apocalyptic number.

2368509138 is an abundant number, since it is smaller than the sum of its proper divisors (2763708069).

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

2368509138 is an frugal number, since it uses more digits than its factorization.

2368509138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22950 (or 11476 counting only the distinct ones).

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

The square root of 2368509138 is about 48667.3313219453. The cubic root of 2368509138 is about 1332.9842608832.

The spelling of 2368509138 in words is "two billion, three hundred sixty-eight million, five hundred nine thousand, one hundred thirty-eight".