128061400 has 24 divisors (see below), whose sum is σ = 297743220. Its totient is φ = 51224480.

The previous prime is 128061397. The next prime is 128061407. The reversal of 128061400 is 4160821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128061407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 319954 + ... + 320353.

Almost surely, 2^128061400 is an apocalyptic number.

128061400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128061400 is an abundant number, since it is smaller than the sum of its proper divisors (169681820).

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

128061400 is a wasteful number, since it uses less digits than its factorization.

128061400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640323 (or 640314 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 128061400 is about 11316.4216959249. The cubic root of 128061400 is about 504.0489895271.

The spelling of 128061400 in words is "one hundred twenty-eight million, sixty-one thousand, four hundred".