138624600728 has 8 divisors (see below), whose sum is σ = 259921126380. Its totient is φ = 69312300360.

The previous prime is 138624600713. The next prime is 138624600731. The reversal of 138624600728 is 827006426831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×138624600728³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8664037538 + ... + 8664037553.

Almost surely, 2^138624600728 is an apocalyptic number.

It is an amenable number.

138624600728 is a deficient number, since it is larger than the sum of its proper divisors (121296525652).

138624600728 is a wasteful number, since it uses less digits than its factorization.

138624600728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17328075097 (or 17328075093 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 138624600728 in words is "one hundred thirty-eight billion, six hundred twenty-four million, six hundred thousand, seven hundred twenty-eight".