128501268 has 24 divisors (see below), whose sum is σ = 342670272. Its totient is φ = 36714624.

The previous prime is 128501251. The next prime is 128501273. The reversal of 128501268 is 862105821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764805 + ... + 764972.

It is an arithmetic number, because the mean of its divisors is an integer number (14277928).

Almost surely, 2^128501268 is an apocalyptic number.

It is an amenable number.

128501268 is an abundant number, since it is smaller than the sum of its proper divisors (214169004).

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

128501268 is a wasteful number, since it uses less digits than its factorization.

128501268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529791 (or 1529789 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 128501268 is about 11335.8399776991. The cubic root of 128501268 is about 504.6254360695.

The spelling of 128501268 in words is "one hundred twenty-eight million, five hundred one thousand, two hundred sixty-eight".