128032377 has 32 divisors (see below), whose sum is σ = 191662080. Its totient is φ = 75366720.

The previous prime is 128032369. The next prime is 128032403. The reversal of 128032377 is 773230821.

It is not a de Polignac number, because 128032377 - 2³ = 128032369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (128032327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174303 + ... + 175035.

It is an arithmetic number, because the mean of its divisors is an integer number (5989440).

Almost surely, 2^128032377 is an apocalyptic number.

It is an amenable number.

128032377 is a deficient number, since it is larger than the sum of its proper divisors (63629703).

128032377 is a wasteful number, since it uses less digits than its factorization.

128032377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 128032377 is about 11315.1392832788. The cubic root of 128032377 is about 504.0109085255.

The spelling of 128032377 in words is "one hundred twenty-eight million, thirty-two thousand, three hundred seventy-seven".