70280 has 32 divisors (see below), whose sum is σ = 181440. Its totient is φ = 24000.

The previous prime is 70271. The next prime is 70289. The reversal of 70280 is 8207.

70280 = T₅ + T₆ + ... + T₇₄.

It is an interprime number because it is at equal distance from previous prime (70271) and next prime (70289).

It is a plaindrome in base 16.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70289) by changing a digit.

70280 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (5670).

2⁷⁰²⁸⁰ is an apocalyptic number.

70280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90720).

70280 is an abundant number, since it is smaller than the sum of its proper divisors (111160).

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

70280 is a wasteful number, since it uses less digits than its factorization.

70280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 265 counting only the distinct ones).

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

The square root of 70280 is about 265.1037532741. The cubic root of 70280 is about 41.2677303638.

Adding to 70280 its reverse (8207), we get a palindrome (78487).

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

The spelling of 70280 in words is "seventy thousand, two hundred eighty".