128262812 has 24 divisors (see below), whose sum is σ = 239210496. Its totient is φ = 60035888.

The previous prime is 128262769. The next prime is 128262821. The reversal of 128262812 is 218262821.

It is a congruent number.

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, 10508 + ... + 19155.

It is an arithmetic number, because the mean of its divisors is an integer number (9967104).

Almost surely, 2^128262812 is an apocalyptic number.

It is an amenable number.

128262812 is a deficient number, since it is larger than the sum of its proper divisors (110947684).

128262812 is a wasteful number, since it uses less digits than its factorization.

128262812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29737 (or 29735 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 128262812 is about 11325.3173023982. The cubic root of 128262812 is about 504.3131032985.

Subtracting 128262812 from its reverse (218262821), we obtain a palindrome (90000009).

The spelling of 128262812 in words is "one hundred twenty-eight million, two hundred sixty-two thousand, eight hundred twelve".