138802005 has 40 divisors (see below), whose sum is σ = 251219232. Its totient is φ = 73312992.

The previous prime is 138802003. The next prime is 138802009. The reversal of 138802005 is 500208831.

It is a happy number.

138802005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138802005 - 2¹ = 138802003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 138802005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138802003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41734 + ... + 44936.

Almost surely, 2^138802005 is an apocalyptic number.

138802005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138802005 is a deficient number, since it is larger than the sum of its proper divisors (112417227).

138802005 is a wasteful number, since it uses less digits than its factorization.

138802005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327 (or 3318 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 138802005 is about 11781.4262718909. The cubic root of 138802005 is about 517.7640744226.

The spelling of 138802005 in words is "one hundred thirty-eight million, eight hundred two thousand, five".