128395513 has 8 divisors (see below), whose sum is σ = 132455232. Its totient is φ = 124366896.

The previous prime is 128395511. The next prime is 128395523. The reversal of 128395513 is 315593821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128395513 - 2¹ = 128395511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128395511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756 + ... + 16042.

It is an arithmetic number, because the mean of its divisors is an integer number (16556904).

Almost surely, 2^128395513 is an apocalyptic number.

It is an amenable number.

128395513 is a deficient number, since it is larger than the sum of its proper divisors (4059719).

128395513 is a wasteful number, since it uses less digits than its factorization.

128395513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551.

The product of its digits is 32400, while the sum is 37.

The square root of 128395513 is about 11331.1743875028. The cubic root of 128395513 is about 504.4869645183.

It can be divided in two parts, 128 and 395513, that added together give a square (395641 = 629²).

The spelling of 128395513 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, five hundred thirteen".