128257610 has 16 divisors (see below), whose sum is σ = 248622696. Its totient is φ = 47356608.

The previous prime is 128257603. The next prime is 128257627. The reversal of 128257610 is 16752821.

It can be written as a sum of positive squares in 4 ways, for example, as 70543201 + 57714409 = 8399^2 + 7597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493169 + ... + 493428.

Almost surely, 2^128257610 is an apocalyptic number.

128257610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128257610 is a deficient number, since it is larger than the sum of its proper divisors (120365086).

128257610 is a wasteful number, since it uses less digits than its factorization.

128257610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986617.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 128257610 is about 11325.0876376300. The cubic root of 128257610 is about 504.3062853383.

The spelling of 128257610 in words is "one hundred twenty-eight million, two hundred fifty-seven thousand, six hundred ten".