138030236 has 12 divisors (see below), whose sum is σ = 243945240. Its totient is φ = 68331600.

The previous prime is 138030229. The next prime is 138030253. The reversal of 138030236 is 632030831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170426 + ... + 171233.

It is an arithmetic number, because the mean of its divisors is an integer number (20328770).

Almost surely, 2^138030236 is an apocalyptic number.

It is an amenable number.

138030236 is a deficient number, since it is larger than the sum of its proper divisors (105915004).

138030236 is a wasteful number, since it uses less digits than its factorization.

138030236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341764 (or 341762 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 138030236 is about 11748.6269836096. The cubic root of 138030236 is about 516.8026637950.

The spelling of 138030236 in words is "one hundred thirty-eight million, thirty thousand, two hundred thirty-six".