128268699 has 16 divisors (see below), whose sum is σ = 188466432. Its totient is φ = 77097888.

The previous prime is 128268697. The next prime is 128268703. The reversal of 128268699 is 996862821.

It is not a de Polignac number, because 128268699 - 2¹ = 128268697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128268691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36567 + ... + 39920.

It is an arithmetic number, because the mean of its divisors is an integer number (11779152).

Almost surely, 2^128268699 is an apocalyptic number.

128268699 is a deficient number, since it is larger than the sum of its proper divisors (60197733).

128268699 is a wasteful number, since it uses less digits than its factorization.

128268699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76546.

The product of its digits is 746496, while the sum is 51.

The square root of 128268699 is about 11325.5772038338. The cubic root of 128268699 is about 504.3208188261.

The spelling of 128268699 in words is "one hundred twenty-eight million, two hundred sixty-eight thousand, six hundred ninety-nine".