70441728 has 72 divisors (see below), whose sum is σ = 214276608. Its totient is φ = 20124672.

The previous prime is 70441699. The next prime is 70441729. The reversal of 70441728 is 82714407.

It is not an unprimeable number, because it can be changed into a prime (70441729) 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, 1176 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (2976064).

Almost surely, 2^70441728 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 70441728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107138304).

70441728 is an abundant number, since it is smaller than the sum of its proper divisors (143834880).

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

70441728 is a wasteful number, since it uses less digits than its factorization.

70441728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13129 (or 13115 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 70441728 is about 8392.9570474297. The cubic root of 70441728 is about 412.9936114797.

The spelling of 70441728 in words is "seventy million, four hundred forty-one thousand, seven hundred twenty-eight".