138280534 has 16 divisors (see below), whose sum is σ = 240939936. Its totient is φ = 58291200.

The previous prime is 138280517. The next prime is 138280547. The reversal of 138280534 is 435082831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 138280534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80107 + ... + 81814.

It is an arithmetic number, because the mean of its divisors is an integer number (15058746).

Almost surely, 2^138280534 is an apocalyptic number.

138280534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138280534 is a deficient number, since it is larger than the sum of its proper divisors (102659402).

138280534 is a wasteful number, since it uses less digits than its factorization.

138280534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161991.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 138280534 is about 11759.2743823758. The cubic root of 138280534 is about 517.1148576226.

The spelling of 138280534 in words is "one hundred thirty-eight million, two hundred eighty thousand, five hundred thirty-four".