128029995 has 24 divisors (see below), whose sum is σ = 222252576. Its totient is φ = 68179968.

The previous prime is 128029991. The next prime is 128030051. The reversal of 128029995 is 599920821.

It is not a de Polignac number, because 128029995 - 2² = 128029991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128029995.

It is not an unprimeable number, because it can be changed into a prime (128029991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35307 + ... + 38763.

It is an arithmetic number, because the mean of its divisors is an integer number (9260524).

Almost surely, 2^128029995 is an apocalyptic number.

128029995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128029995 is a deficient number, since it is larger than the sum of its proper divisors (94222581).

128029995 is a wasteful number, since it uses less digits than its factorization.

128029995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291 (or 4288 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 128029995 is about 11315.0340255785. The cubic root of 128029995 is about 504.0077828541.

The spelling of 128029995 in words is "one hundred twenty-eight million, twenty-nine thousand, nine hundred ninety-five".