128250838 has 4 divisors (see below), whose sum is σ = 192376260. Its totient is φ = 64125418.

The previous prime is 128250821. The next prime is 128250877. The reversal of 128250838 is 838052821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838052821 = 541 ⋅1549081.

It is a junction number, because it is equal to n+sod(n) for n = 128250797 and 128250806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32062708 + ... + 32062711.

It is an arithmetic number, because the mean of its divisors is an integer number (48094065).

Almost surely, 2^128250838 is an apocalyptic number.

128250838 is a deficient number, since it is larger than the sum of its proper divisors (64125422).

128250838 is an equidigital number, since it uses as much as digits as its factorization.

128250838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64125421.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 128250838 is about 11324.7886514495. The cubic root of 128250838 is about 504.2974093938.

The spelling of 128250838 in words is "one hundred twenty-eight million, two hundred fifty thousand, eight hundred thirty-eight".