387149928 has 128 divisors (see below), whose sum is σ = 1126656000. Its totient is φ = 109624320.

The previous prime is 387149863. The next prime is 387149929. The reversal of 387149928 is 829941783.

It is not an unprimeable number, because it can be changed into a prime (387149929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395776 + ... + 396752.

It is an arithmetic number, because the mean of its divisors is an integer number (8802000).

Almost surely, 2^387149928 is an apocalyptic number.

387149928 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387149928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563328000).

387149928 is an abundant number, since it is smaller than the sum of its proper divisors (739506072).

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

387149928 is a wasteful number, since it uses less digits than its factorization.

387149928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1091 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 387149928 is about 19676.1258381827. The cubic root of 387149928 is about 728.8302577283.

The spelling of 387149928 in words is "three hundred eighty-seven million, one hundred forty-nine thousand, nine hundred twenty-eight".