128111004 has 96 divisors (see below), whose sum is σ = 383720960. Its totient is φ = 36205056.

The previous prime is 128110979. The next prime is 128111023. The reversal of 128111004 is 400111821.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72459 + ... + 74205.

Almost surely, 2^128111004 is an apocalyptic number.

128111004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128111004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191860480).

128111004 is an abundant number, since it is smaller than the sum of its proper divisors (255609956).

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

128111004 is a wasteful number, since it uses less digits than its factorization.

128111004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1856 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 128111004 is about 11318.6131659316. The cubic root of 128111004 is about 504.1140614861.

Adding to 128111004 its reverse (400111821), we get a palindrome (528222825).

The spelling of 128111004 in words is "one hundred twenty-eight million, one hundred eleven thousand, four".