128084816 has 10 divisors (see below), whose sum is σ = 248164362. Its totient is φ = 64042400.

The previous prime is 128084813. The next prime is 128084819. The reversal of 128084816 is 618480821.

It is an interprime number because it is at equal distance from previous prime (128084813) and next prime (128084819).

It can be written as a sum of positive squares in only one way, i.e., 65674816 + 62410000 = 8104^2 + 7900^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128084816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128084813) by changing a digit.

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 as a sum of consecutive naturals, namely, 4002635 + ... + 4002666.

Almost surely, 2^128084816 is an apocalyptic number.

128084816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128084816 is a deficient number, since it is larger than the sum of its proper divisors (120079546).

128084816 is an equidigital number, since it uses as much as digits as its factorization.

128084816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8005309 (or 8005303 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 128084816 is about 11317.4562512960. The cubic root of 128084816 is about 504.0797094053.

The spelling of 128084816 in words is "one hundred twenty-eight million, eighty-four thousand, eight hundred sixteen".