120828391 has 8 divisors (see below), whose sum is σ = 128105600. Its totient is φ = 113643000.

The previous prime is 120828377. The next prime is 120828397. The reversal of 120828391 is 193828021.

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

It is a cyclic number.

It is not a de Polignac number, because 120828391 - 2⁹ = 120827879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120828397) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 20235 + ... + 25516.

It is an arithmetic number, because the mean of its divisors is an integer number (16013200).

Almost surely, 2^120828391 is an apocalyptic number.

120828391 is a deficient number, since it is larger than the sum of its proper divisors (7277209).

120828391 is a wasteful number, since it uses less digits than its factorization.

120828391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45909.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 120828391 is about 10992.1968232014. The cubic root of 120828391 is about 494.3748063895.

The spelling of 120828391 in words is "one hundred twenty million, eight hundred twenty-eight thousand, three hundred ninety-one".