387394725750138 has 24 divisors (see below), whose sum is σ = 839356739315328. Its totient is φ = 129131344451592.

The previous prime is 387394725750127. The next prime is 387394725750143. The reversal of 387394725750138 is 831057527493783.

387394725750138 is a `hidden beast` number, since 3 + 8 + 7 + 3 + 9 + 47 + 2 + 575 + 0 + 1 + 3 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8727370 + ... + 29171157.

It is an arithmetic number, because the mean of its divisors is an integer number (34973197471472).

Almost surely, 2^{387394725750138} is an apocalyptic number.

387394725750138 is an abundant number, since it is smaller than the sum of its proper divisors (451962013565190).

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

387394725750138 is a wasteful number, since it uses less digits than its factorization.

387394725750138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38466418 (or 38466415 counting only the distinct ones).

The product of its (nonzero) digits is 1066867200, while the sum is 72.

The spelling of 387394725750138 in words is "three hundred eighty-seven trillion, three hundred ninety-four billion, seven hundred twenty-five million, seven hundred fifty thousand, one hundred thirty-eight".