128465500 has 24 divisors (see below), whose sum is σ = 280569744. Its totient is φ = 51386000.

The previous prime is 128465497. The next prime is 128465501. The reversal of 128465500 is 5564821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128465501) 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, 127966 + ... + 128965.

It is an arithmetic number, because the mean of its divisors is an integer number (11690406).

Almost surely, 2^128465500 is an apocalyptic number.

128465500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128465500 is an abundant number, since it is smaller than the sum of its proper divisors (152104244).

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

128465500 is a wasteful number, since it uses less digits than its factorization.

128465500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256950 (or 256938 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 128465500 is about 11334.2622168362. The cubic root of 128465500 is about 504.5786113240.

The spelling of 128465500 in words is "one hundred twenty-eight million, four hundred sixty-five thousand, five hundred".