128526464 has 32 divisors (see below), whose sum is σ = 279329040. Its totient is φ = 58420480.

The previous prime is 128526449. The next prime is 128526467. The reversal of 128526464 is 464625821.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (128526467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44234 + ... + 47049.

Almost surely, 2^128526464 is an apocalyptic number.

It is an amenable number.

128526464 is an abundant number, since it is smaller than the sum of its proper divisors (150802576).

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

128526464 is an equidigital number, since it uses as much as digits as its factorization.

128526464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91308 (or 91296 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 128526464 is about 11336.9512656622. The cubic root of 128526464 is about 504.6584155406.

The spelling of 128526464 in words is "one hundred twenty-eight million, five hundred twenty-six thousand, four hundred sixty-four".