70707272 has 16 divisors (see below), whose sum is σ = 133890300. Its totient is φ = 35003200.

The previous prime is 70707271. The next prime is 70707323. The reversal of 70707272 is 27270707.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 23290276 = 6886^2 + 4826^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (70707271) by changing a digit.

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, 42947 + ... + 44562.

Almost surely, 2^70707272 is an apocalyptic number.

It is an amenable number.

70707272 is a deficient number, since it is larger than the sum of its proper divisors (63183028).

70707272 is a wasteful number, since it uses less digits than its factorization.

70707272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87616 (or 87612 counting only the distinct ones).

The product of its (nonzero) digits is 9604, while the sum is 32.

The square root of 70707272 is about 8408.7616210712. The cubic root of 70707272 is about 413.5119143925.

Adding to 70707272 its reverse (27270707), we get a palindrome (97977979).

The spelling of 70707272 in words is "seventy million, seven hundred seven thousand, two hundred seventy-two".