128938350 has 48 divisors (see below), whose sum is σ = 330804720. Its totient is φ = 33196800.

The previous prime is 128938339. The next prime is 128938357. The reversal of 128938350 is 53839821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128938299 and 128938308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128938357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10471 + ... + 19170.

It is an arithmetic number, because the mean of its divisors is an integer number (6891765).

Almost surely, 2^128938350 is an apocalyptic number.

128938350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128938350 is an abundant number, since it is smaller than the sum of its proper divisors (201866370).

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

128938350 is a wasteful number, since it uses less digits than its factorization.

128938350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29685 (or 29680 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 128938350 is about 11355.1023773456. The cubic root of 128938350 is about 505.1969300245.

The spelling of 128938350 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred fifty".