128858464 has 24 divisors (see below), whose sum is σ = 289932048. Its totient is φ = 55224960.

The previous prime is 128858447. The next prime is 128858467. The reversal of 128858464 is 464858821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128858467) 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, 287407 + ... + 287854.

It is an arithmetic number, because the mean of its divisors is an integer number (12080502).

Almost surely, 2^128858464 is an apocalyptic number.

128858464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128858464 is an abundant number, since it is smaller than the sum of its proper divisors (161073584).

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

128858464 is an equidigital number, since it uses as much as digits as its factorization.

128858464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575278 (or 575270 counting only the distinct ones).

The product of its digits is 491520, while the sum is 46.

The square root of 128858464 is about 11351.5842066207. The cubic root of 128858464 is about 505.0925739513.

The spelling of 128858464 in words is "one hundred twenty-eight million, eight hundred fifty-eight thousand, four hundred sixty-four".