70812720 has 120 divisors (see below), whose sum is σ = 259461072. Its totient is φ = 17164800.

The previous prime is 70812719. The next prime is 70812727. The reversal of 70812720 is 2721807.

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 (70812727) 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, 3450 + ... + 12390.

Almost surely, 2^70812720 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 70812720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129730536).

70812720 is an abundant number, since it is smaller than the sum of its proper divisors (188648352).

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

70812720 is a wasteful number, since it uses less digits than its factorization.

70812720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971 (or 8962 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 70812720 is about 8415.0294117133. The cubic root of 70812720 is about 413.7173734400.

It can be divided in two parts, 7081 and 2720, that added together give a square (9801 = 99²).

The spelling of 70812720 in words is "seventy million, eight hundred twelve thousand, seven hundred twenty".