128885478 has 8 divisors (see below), whose sum is σ = 257770968. Its totient is φ = 42961824.

The previous prime is 128885473. The next prime is 128885479. The reversal of 128885478 is 874588821.

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

128885478 is an admirable number.

It is a super-2 number, since 2×128885478² = 33222932878576968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128885478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128885473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10740451 + ... + 10740462.

It is an arithmetic number, because the mean of its divisors is an integer number (32221371).

Almost surely, 2^128885478 is an apocalyptic number.

128885478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128885478 is a wasteful number, since it uses less digits than its factorization.

128885478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21480918.

The product of its digits is 1146880, while the sum is 51.

The square root of 128885478 is about 11352.7740222379. The cubic root of 128885478 is about 505.1278674999.

The spelling of 128885478 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, four hundred seventy-eight".