128540258 has 32 divisors (see below), whose sum is σ = 241781760. Its totient is φ = 49790160.

The previous prime is 128540239. The next prime is 128540299. The reversal of 128540258 is 852045821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25235 + ... + 29897.

It is an arithmetic number, because the mean of its divisors is an integer number (7555680).

Almost surely, 2^128540258 is an apocalyptic number.

128540258 is a deficient number, since it is larger than the sum of its proper divisors (113241502).

128540258 is a wasteful number, since it uses less digits than its factorization.

128540258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 128540258 is about 11337.5596139557. The cubic root of 128540258 is about 504.6764689151.

The spelling of 128540258 in words is "one hundred twenty-eight million, five hundred forty thousand, two hundred fifty-eight".