128941390 has 8 divisors (see below), whose sum is σ = 232094520. Its totient is φ = 51576552.

The previous prime is 128941387. The next prime is 128941403. The reversal of 128941390 is 93149821.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6447060 + ... + 6447079.

It is an arithmetic number, because the mean of its divisors is an integer number (29011815).

Almost surely, 2^128941390 is an apocalyptic number.

128941390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128941390 is a deficient number, since it is larger than the sum of its proper divisors (103153130).

128941390 is a wasteful number, since it uses less digits than its factorization.

128941390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12894146.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 128941390 is about 11355.2362370846. The cubic root of 128941390 is about 505.2009003628.

The spelling of 128941390 in words is "one hundred twenty-eight million, nine hundred forty-one thousand, three hundred ninety".