128722710 has 16 divisors (see below), whose sum is σ = 308934576. Its totient is φ = 34326048.

The previous prime is 128722709. The next prime is 128722729. The reversal of 128722710 is 17227821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4290757 = 128722710 / (1 + 2 + 8 + 7 + 2 + 2 + 7 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2145349 + ... + 2145408.

It is an arithmetic number, because the mean of its divisors is an integer number (19308411).

Almost surely, 2^128722710 is an apocalyptic number.

128722710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128722710 is an abundant number, since it is smaller than the sum of its proper divisors (180211866).

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

128722710 is a wasteful number, since it uses less digits than its factorization.

128722710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290767.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 128722710 is about 11345.6031131007. The cubic root of 128722710 is about 504.9151378495.

The spelling of 128722710 in words is "one hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred ten".