128310816 has 48 divisors (see below), whose sum is σ = 342353088. Its totient is φ = 42067200.

The previous prime is 128310769. The next prime is 128310821. The reversal of 128310816 is 618013821.

It is a tau number, because it is divible by the number of its divisors (48).

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, 5100 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (7132356).

Almost surely, 2^128310816 is an apocalyptic number.

128310816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128310816 is an abundant number, since it is smaller than the sum of its proper divisors (214042272).

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

128310816 is a wasteful number, since it uses less digits than its factorization.

128310816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21985 (or 21977 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 128310816 is about 11327.4364266589. The cubic root of 128310816 is about 504.3760106636.

The spelling of 128310816 in words is "one hundred twenty-eight million, three hundred ten thousand, eight hundred sixteen".