70809220 has 12 divisors (see below), whose sum is σ = 148699404. Its totient is φ = 28323680.

The previous prime is 70809187. The next prime is 70809251. The reversal of 70809220 is 2290807.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 63712324 = 2664^2 + 7982^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770211 + ... + 1770250.

It is an arithmetic number, because the mean of its divisors is an integer number (12391617).

Almost surely, 2^70809220 is an apocalyptic number.

It is an amenable number.

70809220 is an abundant number, since it is smaller than the sum of its proper divisors (77890184).

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

70809220 is a wasteful number, since it uses less digits than its factorization.

70809220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540470 (or 3540468 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 70809220 is about 8414.8214478978. The cubic root of 70809220 is about 413.7105571756.

The spelling of 70809220 in words is "seventy million, eight hundred nine thousand, two hundred twenty".