128382408 has 320 divisors, whose sum is σ = 468357120. Its totient is φ = 31881600.

The previous prime is 128382403. The next prime is 128382409. The reversal of 128382408 is 804283821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128382403) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1546735 + ... + 1546817.

It is an arithmetic number, because the mean of its divisors is an integer number (1463616).

Almost surely, 2^128382408 is an apocalyptic number.

128382408 is a gapful number since it is divisible by the number (18) 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 128382408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234178560).

128382408 is an abundant number, since it is smaller than the sum of its proper divisors (339974712).

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

128382408 is a wasteful number, since it uses less digits than its factorization.

128382408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 128382408 is about 11330.5961008236. The cubic root of 128382408 is about 504.4698000384.

The spelling of 128382408 in words is "one hundred twenty-eight million, three hundred eighty-two thousand, four hundred eight".