128612562 has 16 divisors (see below), whose sum is σ = 277011840. Its totient is φ = 39573072.

The previous prime is 128612543. The next prime is 128612569. The reversal of 128612562 is 265216821.

It is a super-4 number, since 4×128612562⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (128612569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824362 + ... + 824517.

It is an arithmetic number, because the mean of its divisors is an integer number (17313240).

Almost surely, 2^128612562 is an apocalyptic number.

128612562 is an abundant number, since it is smaller than the sum of its proper divisors (148399278).

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

128612562 is a wasteful number, since it uses less digits than its factorization.

128612562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648897.

The product of its digits is 11520, while the sum is 33.

The square root of 128612562 is about 11340.7478589377. The cubic root of 128612562 is about 504.7710781533.

The spelling of 128612562 in words is "one hundred twenty-eight million, six hundred twelve thousand, five hundred sixty-two".