70523280 has 120 divisors (see below), whose sum is σ = 242718840. Its totient is φ = 18339840.

The previous prime is 70523279. The next prime is 70523281. The reversal of 70523280 is 8232507.

It is an interprime number because it is at equal distance from previous prime (70523279) and next prime (70523281).

It can be written as a sum of positive squares in 4 ways, for example, as 767376 + 69755904 = 876^2 + 8352^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (70523281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28326 + ... + 30714.

It is an arithmetic number, because the mean of its divisors is an integer number (2022657).

Almost surely, 2^70523280 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 70523280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121359420).

70523280 is an abundant number, since it is smaller than the sum of its proper divisors (172195560).

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

70523280 is a wasteful number, since it uses less digits than its factorization.

70523280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 70523280 is about 8397.8140012744. The cubic root of 70523280 is about 413.1529273983.

Adding to 70523280 its reverse (8232507), we get a palindrome (78755787).

The spelling of 70523280 in words is "seventy million, five hundred twenty-three thousand, two hundred eighty".