128462839 has 4 divisors (see below), whose sum is σ = 128510224. Its totient is φ = 128415456.

The previous prime is 128462771. The next prime is 128462861. The reversal of 128462839 is 938264821.

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

It is a cyclic number.

It is not a de Polignac number, because 128462839 - 2²³ = 120074231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128462795 and 128462804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128462879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19362 + ... + 25135.

It is an arithmetic number, because the mean of its divisors is an integer number (32127556).

Almost surely, 2^128462839 is an apocalyptic number.

128462839 is a deficient number, since it is larger than the sum of its proper divisors (47385).

128462839 is an equidigital number, since it uses as much as digits as its factorization.

128462839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47384.

The product of its digits is 165888, while the sum is 43.

The square root of 128462839 is about 11334.1448287906. The cubic root of 128462839 is about 504.5751273978.

The spelling of 128462839 in words is "one hundred twenty-eight million, four hundred sixty-two thousand, eight hundred thirty-nine".