128930400 has 288 divisors, whose sum is σ = 479969280. Its totient is φ = 33384960.

The previous prime is 128930381. The next prime is 128930411. The reversal of 128930400 is 4039821.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1015137 + ... + 1015263.

It is an arithmetic number, because the mean of its divisors is an integer number (1666560).

Almost surely, 2^128930400 is an apocalyptic number.

128930400 is a gapful number since it is divisible by the number (10) 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 128930400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239984640).

128930400 is an abundant number, since it is smaller than the sum of its proper divisors (351038880).

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

128930400 is a wasteful number, since it uses less digits than its factorization.

128930400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 128930400 is about 11354.7523090554. The cubic root of 128930400 is about 505.1865467725.

The spelling of 128930400 in words is "one hundred twenty-eight million, nine hundred thirty thousand, four hundred".