70720880 has 20 divisors (see below), whose sum is σ = 164426232. Its totient is φ = 28288320.

The previous prime is 70720877. The next prime is 70720891. The reversal of 70720880 is 8802707.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441926 + ... + 442085.

Almost surely, 2^70720880 is an apocalyptic number.

It is an amenable number.

70720880 is an abundant number, since it is smaller than the sum of its proper divisors (93705352).

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

70720880 is a wasteful number, since it uses less digits than its factorization.

70720880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884024 (or 884018 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 70720880 is about 8409.5707381530. The cubic root of 70720880 is about 413.5384402317.

The spelling of 70720880 in words is "seventy million, seven hundred twenty thousand, eight hundred eighty".