128290380 has 48 divisors (see below), whose sum is σ = 360820320. Its totient is φ = 34057728.

The previous prime is 128290373. The next prime is 128290387. The reversal of 128290380 is 83092821.

It is an interprime number because it is at equal distance from previous prime (128290373) and next prime (128290387).

It is not an unprimeable number, because it can be changed into a prime (128290387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9072 + ... + 18408.

It is an arithmetic number, because the mean of its divisors is an integer number (7517090).

Almost surely, 2^128290380 is an apocalyptic number.

128290380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128290380 is an abundant number, since it is smaller than the sum of its proper divisors (232529940).

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

128290380 is a wasteful number, since it uses less digits than its factorization.

128290380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578 (or 9576 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 128290380 is about 11326.5343331489. The cubic root of 128290380 is about 504.3492320029.

The spelling of 128290380 in words is "one hundred twenty-eight million, two hundred ninety thousand, three hundred eighty".