128487400 has 48 divisors (see below), whose sum is σ = 309048300. Its totient is φ = 49620480.

The previous prime is 128487389. The next prime is 128487409. The reversal of 128487400 is 4784821.

It can be written as a sum of positive squares in 6 ways, for example, as 17859076 + 110628324 = 4226^2 + 10518^2 .

It is not an unprimeable number, because it can be changed into a prime (128487409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5277 + ... + 16876.

Almost surely, 2^128487400 is an apocalyptic number.

128487400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128487400 is an abundant number, since it is smaller than the sum of its proper divisors (180560900).

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

128487400 is a wasteful number, since it uses less digits than its factorization.

128487400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22198 (or 22189 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 128487400 is about 11335.2282729551. The cubic root of 128487400 is about 504.6072821700.

The spelling of 128487400 in words is "one hundred twenty-eight million, four hundred eighty-seven thousand, four hundred".