70720320 has 224 divisors, whose sum is σ = 252959616. Its totient is φ = 16588800.

The previous prime is 70720303. The next prime is 70720333. The reversal of 70720320 is 2302707.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 390630 + ... + 390810.

It is an arithmetic number, because the mean of its divisors is an integer number (1129284).

Almost surely, 2^70720320 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 70720320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126479808).

70720320 is an abundant number, since it is smaller than the sum of its proper divisors (182239296).

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

70720320 is a wasteful number, since it uses less digits than its factorization.

70720320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 70720320 is about 8409.5374426897. The cubic root of 70720320 is about 413.5373487005.

The spelling of 70720320 in words is "seventy million, seven hundred twenty thousand, three hundred twenty".