70828 has 6 divisors (see below), whose sum is σ = 123956. Its totient is φ = 35412.

The previous prime is 70823. The next prime is 70841. The reversal of 70828 is 82807.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (70823) by changing a digit.

70828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8850 + ... + 8857.

2⁷⁰⁸²⁸ is an apocalyptic number.

It is an amenable number.

70828 is a deficient number, since it is larger than the sum of its proper divisors (53128).

70828 is a wasteful number, since it uses less digits than its factorization.

70828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17711 (or 17709 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 70828 is about 266.1353039339. The cubic root of 70828 is about 41.3747128672.

It can be divided in two parts, 70 and 828, that added together give a palindrome (898).

The spelling of 70828 in words is "seventy thousand, eight hundred twenty-eight".