70128 has 30 divisors (see below), whose sum is σ = 196664. Its totient is φ = 23328.

The previous prime is 70123. The next prime is 70139. The reversal of 70128 is 82107.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 70128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70121) by changing a digit.

70128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100 + ... + 387.

2⁷⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

70128 is an abundant number, since it is smaller than the sum of its proper divisors (126536).

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

70128 is a wasteful number, since it uses less digits than its factorization.

70128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 70128 is about 264.8169178886. The cubic root of 70128 is about 41.2379579174.

It can be divided in two parts, 701 and 28, that added together give a 6-th power (729 = 3⁶).

The spelling of 70128 in words is "seventy thousand, one hundred twenty-eight".