128302780 has 12 divisors (see below), whose sum is σ = 269435880. Its totient is φ = 51321104.

The previous prime is 128302777. The next prime is 128302781. The reversal of 128302780 is 87203821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128302781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3207550 + ... + 3207589.

It is an arithmetic number, because the mean of its divisors is an integer number (22452990).

Almost surely, 2^128302780 is an apocalyptic number.

128302780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128302780 is an abundant number, since it is smaller than the sum of its proper divisors (141133100).

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

128302780 is a wasteful number, since it uses less digits than its factorization.

128302780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415148 (or 6415146 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 128302780 is about 11327.0817071300. The cubic root of 128302780 is about 504.3654808934.

The spelling of 128302780 in words is "one hundred twenty-eight million, three hundred two thousand, seven hundred eighty".