128090340 has 144 divisors (see below), whose sum is σ = 446863872. Its totient is φ = 29092608.

The previous prime is 128090323. The next prime is 128090341. The reversal of 128090340 is 43090821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128090341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348837 + ... + 349203.

Almost surely, 2^128090340 is an apocalyptic number.

128090340 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 128090340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223431936).

128090340 is an abundant number, since it is smaller than the sum of its proper divisors (318773532).

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

128090340 is a wasteful number, since it uses less digits than its factorization.

128090340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 661 counting only the distinct ones).

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

The square root of 128090340 is about 11317.7002964383. The cubic root of 128090340 is about 504.0869558960.

The spelling of 128090340 in words is "one hundred twenty-eight million, ninety thousand, three hundred forty".