138784630 has 8 divisors (see below), whose sum is σ = 249812352. Its totient is φ = 55513848.

The previous prime is 138784627. The next prime is 138784637. The reversal of 138784630 is 36487831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138784630² = 38522347048473800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138784637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6939222 + ... + 6939241.

It is an arithmetic number, because the mean of its divisors is an integer number (31226544).

Almost surely, 2^138784630 is an apocalyptic number.

138784630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138784630 is a deficient number, since it is larger than the sum of its proper divisors (111027722).

138784630 is a wasteful number, since it uses less digits than its factorization.

138784630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13878470.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 138784630 is about 11780.6888593155. The cubic root of 138784630 is about 517.7424692443.

The spelling of 138784630 in words is "one hundred thirty-eight million, seven hundred eighty-four thousand, six hundred thirty".