128290814 has 4 divisors (see below), whose sum is σ = 192436224. Its totient is φ = 64145406.

The previous prime is 128290787. The next prime is 128290817. The reversal of 128290814 is 418092821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 418092821 = 59 ⋅7086319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128290817) by changing a digit.

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, 32072702 + ... + 32072705.

It is an arithmetic number, because the mean of its divisors is an integer number (48109056).

Almost surely, 2^128290814 is an apocalyptic number.

128290814 is a deficient number, since it is larger than the sum of its proper divisors (64145410).

128290814 is an equidigital number, since it uses as much as digits as its factorization.

128290814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64145409.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 128290814 is about 11326.5534916849. The cubic root of 128290814 is about 504.3498007318.

The spelling of 128290814 in words is "one hundred twenty-eight million, two hundred ninety thousand, eight hundred fourteen".