70561280 has 80 divisors (see below), whose sum is σ = 173386224. Its totient is φ = 27525120.

The previous prime is 70561279. The next prime is 70561297. The reversal of 70561280 is 8216507.

It is a tau number, because it is divible by the number of its divisors (80).

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, 109760 + ... + 110400.

Almost surely, 2^70561280 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 70561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86693112).

70561280 is an abundant number, since it is smaller than the sum of its proper divisors (102824944).

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

70561280 is an equidigital number, since it uses as much as digits as its factorization.

70561280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 70561280 is about 8400.0761901307. The cubic root of 70561280 is about 413.2271203562.

Adding to 70561280 its reverse (8216507), we get a palindrome (78777787).

The spelling of 70561280 in words is "seventy million, five hundred sixty-one thousand, two hundred eighty".