128481930 has 32 divisors (see below), whose sum is σ = 342619200. Its totient is φ = 34261776.

The previous prime is 128481923. The next prime is 128481931. The reversal of 128481930 is 39184821.

It is not an unprimeable number, because it can be changed into a prime (128481931) 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, 237660 + ... + 238199.

It is an arithmetic number, because the mean of its divisors is an integer number (10706850).

Almost surely, 2^128481930 is an apocalyptic number.

128481930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128481930 is an abundant number, since it is smaller than the sum of its proper divisors (214137270).

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

128481930 is a wasteful number, since it uses less digits than its factorization.

128481930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475875 (or 475869 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 128481930 is about 11334.9869872003. The cubic root of 128481930 is about 504.6001213096.

The spelling of 128481930 in words is "one hundred twenty-eight million, four hundred eighty-one thousand, nine hundred thirty".