138065630 has 32 divisors (see below), whose sum is σ = 260091648. Its totient is φ = 52704000.

The previous prime is 138065621. The next prime is 138065659. The reversal of 138065630 is 36560831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19580 + ... + 25680.

It is an arithmetic number, because the mean of its divisors is an integer number (8127864).

Almost surely, 2^138065630 is an apocalyptic number.

138065630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138065630 is a deficient number, since it is larger than the sum of its proper divisors (122026018).

138065630 is a wasteful number, since it uses less digits than its factorization.

138065630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 138065630 is about 11750.1331907345. The cubic root of 138065630 is about 516.8468332243.

The spelling of 138065630 in words is "one hundred thirty-eight million, sixty-five thousand, six hundred thirty".