128585650 has 12 divisors (see below), whose sum is σ = 239169402. Its totient is φ = 51434240.

The previous prime is 128585629. The next prime is 128585657. The reversal of 128585650 is 56585821.

It can be written as a sum of positive squares in 3 ways, for example, as 119924401 + 8661249 = 10951^2 + 2943^2 .

It is not an unprimeable number, because it can be changed into a prime (128585657) 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, 1285807 + ... + 1285906.

Almost surely, 2^128585650 is an apocalyptic number.

128585650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128585650 is a deficient number, since it is larger than the sum of its proper divisors (110583752).

128585650 is a wasteful number, since it uses less digits than its factorization.

128585650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571725 (or 2571720 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The square root of 128585650 is about 11339.5612789914. The cubic root of 128585650 is about 504.7358681482.

The spelling of 128585650 in words is "one hundred twenty-eight million, five hundred eighty-five thousand, six hundred fifty".