128887802 has 4 divisors (see below), whose sum is σ = 193331706. Its totient is φ = 64443900.

The previous prime is 128887799. The next prime is 128887859. The reversal of 128887802 is 208788821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208788821 = 2207 ⋅94603.

It can be written as a sum of positive squares in only one way, i.e., 67092481 + 61795321 = 8191^2 + 7861^2 .

It is a super-2 number, since 2×128887802² = 33224131008782408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221949 + ... + 32221952.

Almost surely, 2^128887802 is an apocalyptic number.

128887802 is a deficient number, since it is larger than the sum of its proper divisors (64443904).

128887802 is an equidigital number, since it uses as much as digits as its factorization.

128887802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64443903.

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 128887802 is about 11352.8763756151. The cubic root of 128887802 is about 505.1309035547.

The spelling of 128887802 in words is "one hundred twenty-eight million, eight hundred eighty-seven thousand, eight hundred two".