128039826 has 8 divisors (see below), whose sum is σ = 256079664. Its totient is φ = 42679940.

The previous prime is 128039819. The next prime is 128039833. The reversal of 128039826 is 628930821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128039819) and next prime (128039833).

It is a sphenic number, since it is the product of 3 distinct primes.

128039826 is an admirable number.

It is a super-2 number, since 2×128039826² = 32788394084220552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10669980 + ... + 10669991.

It is an arithmetic number, because the mean of its divisors is an integer number (32009958).

Almost surely, 2^128039826 is an apocalyptic number.

128039826 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128039826 is a wasteful number, since it uses less digits than its factorization.

128039826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21339976.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128039826 is about 11315.4684392649. The cubic root of 128039826 is about 504.0206828877.

The spelling of 128039826 in words is "one hundred twenty-eight million, thirty-nine thousand, eight hundred twenty-six".