138375765 has 48 divisors (see below), whose sum is σ = 275446080. Its totient is φ = 63555840.

The previous prime is 138375761. The next prime is 138375781. The reversal of 138375765 is 567573831.

It is not a de Polignac number, because 138375765 - 2² = 138375761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138375765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138375761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2049 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (5738460).

Almost surely, 2^138375765 is an apocalyptic number.

138375765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138375765 is a deficient number, since it is larger than the sum of its proper divisors (137070315).

138375765 is a wasteful number, since it uses less digits than its factorization.

138375765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14754 (or 14751 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 138375765 is about 11763.3228723860. The cubic root of 138375765 is about 517.2335392214.

The spelling of 138375765 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, seven hundred sixty-five".