70011728 has 20 divisors (see below), whose sum is σ = 138208788. Its totient is φ = 34344960.

The previous prime is 70011709. The next prime is 70011737. The reversal of 70011728 is 82711007.

It can be written as a sum of positive squares in 2 ways, for example, as 54582544 + 15429184 = 7388^2 + 3928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 70011697 and 70011706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40433 + ... + 42128.

Almost surely, 2^70011728 is an apocalyptic number.

It is an amenable number.

70011728 is a deficient number, since it is larger than the sum of its proper divisors (68197060).

70011728 is a wasteful number, since it uses less digits than its factorization.

70011728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82622 (or 82616 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 70011728 is about 8367.3011180428. The cubic root of 70011728 is about 412.1515450927.

The spelling of 70011728 in words is "seventy million, eleven thousand, seven hundred twenty-eight".