128940464 has 10 divisors (see below), whose sum is σ = 249822180. Its totient is φ = 64470224.

The previous prime is 128940421. The next prime is 128940491. The reversal of 128940464 is 464049821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4029374 + ... + 4029405.

It is an arithmetic number, because the mean of its divisors is an integer number (24982218).

Almost surely, 2^128940464 is an apocalyptic number.

It is an amenable number.

128940464 is a deficient number, since it is larger than the sum of its proper divisors (120881716).

128940464 is an equidigital number, since it uses as much as digits as its factorization.

128940464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058787 (or 8058781 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 128940464 is about 11355.1954628707. The cubic root of 128940464 is about 505.1996909834.

The spelling of 128940464 in words is "one hundred twenty-eight million, nine hundred forty thousand, four hundred sixty-four".