70725520 has 20 divisors (see below), whose sum is σ = 164437020. Its totient is φ = 28290176.

The previous prime is 70725509. The next prime is 70725521. The reversal of 70725520 is 2552707.

It can be written as a sum of positive squares in 2 ways, for example, as 52475536 + 18249984 = 7244^2 + 4272^2 .

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

It is not an unprimeable number, because it can be changed into a prime (70725521) by changing a digit.

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, 441955 + ... + 442114.

It is an arithmetic number, because the mean of its divisors is an integer number (8221851).

Almost surely, 2^70725520 is an apocalyptic number.

It is an amenable number.

70725520 is an abundant number, since it is smaller than the sum of its proper divisors (93711500).

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

70725520 is a wasteful number, since it uses less digits than its factorization.

70725520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884082 (or 884076 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 70725520 is about 8409.8466097783. The cubic root of 70725520 is about 413.5474841256.

The spelling of 70725520 in words is "seventy million, seven hundred twenty-five thousand, five hundred twenty".