239440728837 has 24 divisors (see below), whose sum is σ = 338824153440. Its totient is φ = 150380765280.

The previous prime is 239440728823. The next prime is 239440728881. The reversal of 239440728837 is 738827044932.

It is a happy number.

It is not a de Polignac number, because 239440728837 - 2¹² = 239440724741 is a prime.

It is a super-3 number, since 3×239440728837³ (a number of 35 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239440728817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423714 + ... + 811427.

It is an arithmetic number, because the mean of its divisors is an integer number (14117673060).

Almost surely, 2^239440728837 is an apocalyptic number.

It is an amenable number.

239440728837 is a deficient number, since it is larger than the sum of its proper divisors (99383424603).

239440728837 is a wasteful number, since it uses less digits than its factorization.

239440728837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235361 (or 1235342 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 239440728837 in words is "two hundred thirty-nine billion, four hundred forty million, seven hundred twenty-eight thousand, eight hundred thirty-seven".