128731210 has 16 divisors (see below), whose sum is σ = 232759296. Its totient is φ = 51260688.

The previous prime is 128731201. The next prime is 128731217. The reversal of 128731210 is 12137821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128731217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26634 + ... + 31093.

It is an arithmetic number, because the mean of its divisors is an integer number (14547456).

Almost surely, 2^128731210 is an apocalyptic number.

128731210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128731210 is a deficient number, since it is larger than the sum of its proper divisors (104028086).

128731210 is a wasteful number, since it uses less digits than its factorization.

128731210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57957.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 128731210 is about 11345.9777013706. The cubic root of 128731210 is about 504.9262513617.

The spelling of 128731210 in words is "one hundred twenty-eight million, seven hundred thirty-one thousand, two hundred ten".