128507322 has 16 divisors (see below), whose sum is σ = 258452640. Its totient is φ = 42596112.

The previous prime is 128507311. The next prime is 128507333. The reversal of 128507322 is 223705821.

It is an interprime number because it is at equal distance from previous prime (128507311) and next prime (128507333).

It is a super-2 number, since 2×128507322² = 33028263615223368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128507322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58753 + ... + 60900.

It is an arithmetic number, because the mean of its divisors is an integer number (16153290).

Almost surely, 2^128507322 is an apocalyptic number.

128507322 is an abundant number, since it is smaller than the sum of its proper divisors (129945318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128507322 is a wasteful number, since it uses less digits than its factorization.

128507322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119837.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 128507322 is about 11336.1070037293. The cubic root of 128507322 is about 504.6333606461.

The spelling of 128507322 in words is "one hundred twenty-eight million, five hundred seven thousand, three hundred twenty-two".