70000028 has 36 divisors (see below), whose sum is σ = 150008040. Its totient is φ = 28419552.

The previous prime is 70000027. The next prime is 70000037. The reversal of 70000028 is 82000007.

It is a junction number, because it is equal to n+sod(n) for n = 69999970 and 70000015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70000027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5675 + ... + 13122.

It is an arithmetic number, because the mean of its divisors is an integer number (4166890).

Almost surely, 2^70000028 is an apocalyptic number.

It is an amenable number.

70000028 is an abundant number, since it is smaller than the sum of its proper divisors (80008012).

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

70000028 is a wasteful number, since it uses less digits than its factorization.

70000028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18834 (or 18825 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 70000028 is about 8366.6019386606. The cubic root of 70000028 is about 412.1285849313.

The spelling of 70000028 in words is "seventy million, twenty-eight", and thus it is an aban number and an uban number.