128820351 has 12 divisors (see below), whose sum is σ = 188795096. Its totient is φ = 78072720.

The previous prime is 128820313. The next prime is 128820371. The reversal of 128820351 is 153028821.

It is not a de Polignac number, because 128820351 - 2⁶ = 128820287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128820311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177076 + ... + 177801.

Almost surely, 2^128820351 is an apocalyptic number.

128820351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128820351 is a deficient number, since it is larger than the sum of its proper divisors (59974745).

128820351 is a wasteful number, since it uses less digits than its factorization.

128820351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354902 (or 354891 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 128820351 is about 11349.9053300017. The cubic root of 128820351 is about 505.0427712687.

The spelling of 128820351 in words is "one hundred twenty-eight million, eight hundred twenty thousand, three hundred fifty-one".