28070 has 16 divisors (see below), whose sum is σ = 57888. Its totient is φ = 9600.

The previous prime is 28069. The next prime is 28081. The reversal of 28070 is 7082.

It is a nialpdrome in base 14.

It is a congruent number.

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, 131 + ... + 270.

It is an arithmetic number, because the mean of its divisors is an integer number (3618).

2²⁸⁰⁷⁰ is an apocalyptic number.

28070 is an abundant number, since it is smaller than the sum of its proper divisors (29818).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28944).

28070 is a wasteful number, since it uses less digits than its factorization.

28070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

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

The square root of 28070 is about 167.5410397485. The cubic root of 28070 is about 30.3911735687.

Adding to 28070 its product of nonzero digits (112), we get a palindrome (28182).

It can be divided in two parts, 280 and 70, that multiplied together give a square (19600 = 140²).

The spelling of 28070 in words is "twenty-eight thousand, seventy".