70209730 has 16 divisors (see below), whose sum is σ = 130454784. Its totient is φ = 27177840.

The previous prime is 70209703. The next prime is 70209739. The reversal of 70209730 is 3790207.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (70209739) 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 7 ways as a sum of consecutive naturals, for example, 112932 + ... + 113551.

It is an arithmetic number, because the mean of its divisors is an integer number (8153424).

Almost surely, 2^70209730 is an apocalyptic number.

70209730 is a deficient number, since it is larger than the sum of its proper divisors (60245054).

70209730 is a wasteful number, since it uses less digits than its factorization.

70209730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226521.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 70209730 is about 8379.1246559530. The cubic root of 70209730 is about 412.5397182447.

Adding to 70209730 its reverse (3790207), we get a palindrome (73999937).

The spelling of 70209730 in words is "seventy million, two hundred nine thousand, seven hundred thirty".