128607849 has 6 divisors (see below), whose sum is σ = 185766906. Its totient is φ = 85738560.

The previous prime is 128607847. The next prime is 128607863. The reversal of 128607849 is 948706821.

It can be written as a sum of positive squares in only one way, i.e., 84052224 + 44555625 = 9168^2 + 6675^2 .

It is not a de Polignac number, because 128607849 - 2¹ = 128607847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128607847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7144872 + ... + 7144889.

It is an arithmetic number, because the mean of its divisors is an integer number (30961151).

Almost surely, 2^128607849 is an apocalyptic number.

It is an amenable number.

128607849 is a deficient number, since it is larger than the sum of its proper divisors (57159057).

128607849 is a wasteful number, since it uses less digits than its factorization.

128607849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289767 (or 14289764 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 128607849 is about 11340.5400665048. The cubic root of 128607849 is about 504.7649123088.

The spelling of 128607849 in words is "one hundred twenty-eight million, six hundred seven thousand, eight hundred forty-nine".