138202002 has 12 divisors (see below), whose sum is σ = 299437710. Its totient is φ = 46067328.

The previous prime is 138201979. The next prime is 138202063. The reversal of 138202002 is 200202831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 135978921 + 2223081 = 11661^2 + 1491^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7677889 = 138202002 / (1 + 3 + 8 + 2 + 0 + 2 + 0 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3838927 + ... + 3838962.

Almost surely, 2^138202002 is an apocalyptic number.

138202002 is an abundant number, since it is smaller than the sum of its proper divisors (161235708).

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

138202002 is a wasteful number, since it uses less digits than its factorization.

138202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677897 (or 7677894 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 138202002 is about 11755.9347565389. The cubic root of 138202002 is about 517.0169461452.

Adding to 138202002 its reverse (200202831), we get a palindrome (338404833).

The spelling of 138202002 in words is "one hundred thirty-eight million, two hundred two thousand, two".