128446765 has 8 divisors (see below), whose sum is σ = 154399608. Its totient is φ = 102581760.

The previous prime is 128446763. The next prime is 128446807. The reversal of 128446765 is 567644821.

It can be written as a sum of positive squares in 4 ways, for example, as 40780996 + 87665769 = 6386^2 + 9363^2 .

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

It is not a de Polignac number, because 128446765 - 2¹ = 128446763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128446763) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 18696 + ... + 24625.

It is an arithmetic number, because the mean of its divisors is an integer number (19299951).

Almost surely, 2^128446765 is an apocalyptic number.

It is an amenable number.

128446765 is a deficient number, since it is larger than the sum of its proper divisors (25952843).

128446765 is an equidigital number, since it uses as much as digits as its factorization.

128446765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43919.

The product of its digits is 322560, while the sum is 43.

The square root of 128446765 is about 11333.4357103219. The cubic root of 128446765 is about 504.5540814181.

The spelling of 128446765 in words is "one hundred twenty-eight million, four hundred forty-six thousand, seven hundred sixty-five".