128943057 has 8 divisors (see below), whose sum is σ = 173445984. Its totient is φ = 85201088.

The previous prime is 128943053. The next prime is 128943071. The reversal of 128943057 is 750349821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128943057 - 2² = 128943053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128943053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189843 + ... + 190520.

It is an arithmetic number, because the mean of its divisors is an integer number (21680748).

Almost surely, 2^128943057 is an apocalyptic number.

It is an amenable number.

128943057 is a deficient number, since it is larger than the sum of its proper divisors (44502927).

128943057 is a wasteful number, since it uses less digits than its factorization.

128943057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380479.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 128943057 is about 11355.3096391072. The cubic root of 128943057 is about 505.2030774922.

It can be divided in two parts, 12894 and 3057, that added together give a palindrome (15951).

The spelling of 128943057 in words is "one hundred twenty-eight million, nine hundred forty-three thousand, fifty-seven".