70729836 has 12 divisors (see below), whose sum is σ = 165036312. Its totient is φ = 23576608.

The previous prime is 70729819. The next prime is 70729871. The reversal of 70729836 is 63892707.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

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 3 ways as a sum of consecutive naturals, for example, 2947065 + ... + 2947088.

It is an arithmetic number, because the mean of its divisors is an integer number (13753026).

Almost surely, 2^70729836 is an apocalyptic number.

It is an amenable number.

70729836 is an abundant number, since it is smaller than the sum of its proper divisors (94306476).

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

70729836 is a wasteful number, since it uses less digits than its factorization.

70729836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894160 (or 5894158 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 70729836 is about 8410.1032098304. The cubic root of 70729836 is about 413.5558961511. Note that the first 3 decimals are identical.

The spelling of 70729836 in words is "seventy million, seven hundred twenty-nine thousand, eight hundred thirty-six".