128338390 has 32 divisors (see below), whose sum is σ = 241698816. Its totient is φ = 48972000.

The previous prime is 128338381. The next prime is 128338403. The reversal of 128338390 is 93833821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170515 + ... + 171265.

It is an arithmetic number, because the mean of its divisors is an integer number (7553088).

Almost surely, 2^128338390 is an apocalyptic number.

128338390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128338390 is a deficient number, since it is larger than the sum of its proper divisors (113360426).

128338390 is a wasteful number, since it uses less digits than its factorization.

128338390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 128338390 is about 11328.6534945685. The cubic root of 128338390 is about 504.4121382181.

The spelling of 128338390 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, three hundred ninety".