387751128 has 64 divisors (see below), whose sum is σ = 996226560. Its totient is φ = 125705856.

The previous prime is 387751123. The next prime is 387751129. The reversal of 387751128 is 821157783.

It is a self number, because there is not a number n which added to its sum of digits gives 387751128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387751123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194151 + ... + 196137.

It is an arithmetic number, because the mean of its divisors is an integer number (15566040).

Almost surely, 2^387751128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387751128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498113280).

387751128 is an abundant number, since it is smaller than the sum of its proper divisors (608475432).

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

387751128 is a wasteful number, since it uses less digits than its factorization.

387751128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2212 counting only the distinct ones).

The product of its digits is 94080, while the sum is 42.

The square root of 387751128 is about 19691.3973094852. The cubic root of 387751128 is about 729.2073262348.

It can be divided in two parts, 38775 and 1128, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 387751128 in words is "three hundred eighty-seven million, seven hundred fifty-one thousand, one hundred twenty-eight".