70840128 has 56 divisors (see below), whose sum is σ = 192024000. Its totient is φ = 23034880.

The previous prime is 70840123. The next prime is 70840141. The reversal of 70840128 is 82104807.

It is a junction number, because it is equal to n+sod(n) for n = 70840095 and 70840104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70840123) 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, 3373 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (3429000).

Almost surely, 2^70840128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70840128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96012000).

70840128 is an abundant number, since it is smaller than the sum of its proper divisors (121183872).

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

70840128 is a wasteful number, since it uses less digits than its factorization.

70840128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9055 (or 9045 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 70840128 is about 8416.6577689722. The cubic root of 70840128 is about 413.7707428683.

The spelling of 70840128 in words is "seventy million, eight hundred forty thousand, one hundred twenty-eight".