70028 has 24 divisors (see below), whose sum is σ = 145824. Its totient is φ = 28800.

The previous prime is 70019. The next prime is 70039. The reversal of 70028 is 82007.

70028 = 97² + 98² + ... + 103².

It is a plaindrome in base 16.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 69988 and 70015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1118 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (6076).

2⁷⁰⁰²⁸ 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 70028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72912).

70028 is an abundant number, since it is smaller than the sum of its proper divisors (75796).

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

70028 is a wasteful number, since it uses less digits than its factorization.

70028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 111 counting only the distinct ones).

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

The square root of 70028 is about 264.6280408422. The cubic root of 70028 is about 41.2183473126.

It can be divided in two parts, 700 and 28, that multiplied together give a square (19600 = 140²).

The spelling of 70028 in words is "seventy thousand, twenty-eight".