128389773 has 16 divisors (see below), whose sum is σ = 174080000. Its totient is φ = 84155760.

The previous prime is 128389769. The next prime is 128389799. The reversal of 128389773 is 377983821.

It is not a de Polignac number, because 128389773 - 2² = 128389769 is a prime.

It is a Duffinian number.

Its product of digits (508032) is a multiple of the sum of its prime divisors (2352).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128385773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63228 + ... + 65226.

It is an arithmetic number, because the mean of its divisors is an integer number (10880000).

Almost surely, 2^128389773 is an apocalyptic number.

It is an amenable number.

128389773 is a deficient number, since it is larger than the sum of its proper divisors (45690227).

128389773 is a wasteful number, since it uses less digits than its factorization.

128389773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its digits is 508032, while the sum is 48.

The square root of 128389773 is about 11330.9211011285. The cubic root of 128389773 is about 504.4794466068.

The spelling of 128389773 in words is "one hundred twenty-eight million, three hundred eighty-nine thousand, seven hundred seventy-three".