128458464 has 24 divisors (see below), whose sum is σ = 337203720. Its totient is φ = 42819456.

The previous prime is 128458439. The next prime is 128458471. The reversal of 128458464 is 464854821.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 668959 + ... + 669150.

It is an arithmetic number, because the mean of its divisors is an integer number (14050155).

Almost surely, 2^128458464 is an apocalyptic number.

It is an amenable number.

128458464 is an abundant number, since it is smaller than the sum of its proper divisors (208745256).

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

128458464 is a wasteful number, since it uses less digits than its factorization.

128458464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338122 (or 1338114 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 128458464 is about 11333.9518262608. The cubic root of 128458464 is about 504.5693993048.

The spelling of 128458464 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, four hundred sixty-four".