128885390 has 8 divisors (see below), whose sum is σ = 231993720. Its totient is φ = 51554152.

The previous prime is 128885389. The next prime is 128885411. The reversal of 128885390 is 93588821.

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

It is a super-2 number, since 2×128885390² = 33222887510904200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6444260 + ... + 6444279.

It is an arithmetic number, because the mean of its divisors is an integer number (28999215).

Almost surely, 2^128885390 is an apocalyptic number.

128885390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128885390 is a deficient number, since it is larger than the sum of its proper divisors (103108330).

128885390 is a wasteful number, since it uses less digits than its factorization.

128885390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12888546.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 128885390 is about 11352.7701465325. The cubic root of 128885390 is about 505.1277525367.

The spelling of 128885390 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, three hundred ninety".