128286694 has 4 divisors (see below), whose sum is σ = 192430044. Its totient is φ = 64143346.

The previous prime is 128286661. The next prime is 128286703. The reversal of 128286694 is 496682821.

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

It is a super-3 number, since 3×128286694³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

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, 32071672 + ... + 32071675.

It is an arithmetic number, because the mean of its divisors is an integer number (48107511).

Almost surely, 2^128286694 is an apocalyptic number.

128286694 is a deficient number, since it is larger than the sum of its proper divisors (64143350).

128286694 is an equidigital number, since it uses as much as digits as its factorization.

128286694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64143349.

The product of its digits is 331776, while the sum is 46.

The square root of 128286694 is about 11326.3716167182. The cubic root of 128286694 is about 504.3444016873.

The spelling of 128286694 in words is "one hundred twenty-eight million, two hundred eighty-six thousand, six hundred ninety-four".