128465530 has 16 divisors (see below), whose sum is σ = 231404040. Its totient is φ = 51349312.

The previous prime is 128465503. The next prime is 128465531. The reversal of 128465530 is 35564821.

It can be written as a sum of positive squares in 4 ways, for example, as 111957561 + 16507969 = 10581^2 + 4063^2 .

It is not an unprimeable number, because it can be changed into a prime (128465531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13332 + ... + 20848.

Almost surely, 2^128465530 is an apocalyptic number.

128465530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128465530 is a deficient number, since it is larger than the sum of its proper divisors (102938510).

128465530 is a wasteful number, since it uses less digits than its factorization.

128465530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 128465530 is about 11334.2635402570. The cubic root of 128465530 is about 504.5786506013.

The spelling of 128465530 in words is "one hundred twenty-eight million, four hundred sixty-five thousand, five hundred thirty".