128377445 has 16 divisors (see below), whose sum is σ = 179808768. Its totient is φ = 86156160.

The previous prime is 128377439. The next prime is 128377499. The reversal of 128377445 is 544773821.

It is not a de Polignac number, because 128377445 - 2⁴ = 128377429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37376 + ... + 40665.

It is an arithmetic number, because the mean of its divisors is an integer number (11238048).

Almost surely, 2^128377445 is an apocalyptic number.

It is an amenable number.

128377445 is a deficient number, since it is larger than the sum of its proper divisors (51431323).

128377445 is an equidigital number, since it uses as much as digits as its factorization.

128377445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78100.

The product of its digits is 188160, while the sum is 41.

The square root of 128377445 is about 11330.3770899295. The cubic root of 128377445 is about 504.4632993661.

The spelling of 128377445 in words is "one hundred twenty-eight million, three hundred seventy-seven thousand, four hundred forty-five".