128487886 has 4 divisors (see below), whose sum is σ = 192731832. Its totient is φ = 64243942.

The previous prime is 128487883. The next prime is 128487889. The reversal of 128487886 is 688784821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (128487883) and next prime (128487889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128487883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32121970 + ... + 32121973.

It is an arithmetic number, because the mean of its divisors is an integer number (48182958).

Almost surely, 2^128487886 is an apocalyptic number.

128487886 is a deficient number, since it is larger than the sum of its proper divisors (64243946).

128487886 is an equidigital number, since it uses as much as digits as its factorization.

128487886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64243945.

The product of its digits is 1376256, while the sum is 52.

The square root of 128487886 is about 11335.2497105269. The cubic root of 128487886 is about 504.6079183902.

The spelling of 128487886 in words is "one hundred twenty-eight million, four hundred eighty-seven thousand, eight hundred eighty-six".