128312670 has 32 divisors (see below), whose sum is σ = 316276128. Its totient is φ = 33291648.

The previous prime is 128312641. The next prime is 128312671. The reversal of 128312670 is 76213821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128312671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56689 + ... + 58908.

It is an arithmetic number, because the mean of its divisors is an integer number (9883629).

Almost surely, 2^128312670 is an apocalyptic number.

128312670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128312670 is an abundant number, since it is smaller than the sum of its proper divisors (187963458).

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

128312670 is a wasteful number, since it uses less digits than its factorization.

128312670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115644.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 128312670 is about 11327.5182630619. The cubic root of 128312670 is about 504.3784399434.

The spelling of 128312670 in words is "one hundred twenty-eight million, three hundred twelve thousand, six hundred seventy".