128336357 has 4 divisors (see below), whose sum is σ = 129607116. Its totient is φ = 127065600.

The previous prime is 128336321. The next prime is 128336359. The reversal of 128336357 is 753633821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122190916 + 6145441 = 11054^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 128336357 - 2¹⁸ = 128074213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128336357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128336359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635228 + ... + 635429.

It is an arithmetic number, because the mean of its divisors is an integer number (32401779).

Almost surely, 2^128336357 is an apocalyptic number.

It is an amenable number.

128336357 is a deficient number, since it is larger than the sum of its proper divisors (1270759).

128336357 is a wasteful number, since it uses less digits than its factorization.

128336357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270758.

The product of its digits is 90720, while the sum is 38.

The square root of 128336357 is about 11328.5637659855. The cubic root of 128336357 is about 504.4094747509.

The spelling of 128336357 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, three hundred fifty-seven".