70728626 has 8 divisors (see below), whose sum is σ = 106476780. Its totient is φ = 35236368.

The previous prime is 70728599. The next prime is 70728629. The reversal of 70728626 is 62682707.

It can be written as a sum of positive squares in 2 ways, for example, as 68475625 + 2253001 = 8275^2 + 1501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 70728626.

It is not an unprimeable number, because it can be changed into a prime (70728629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63281 + ... + 64388.

Almost surely, 2^70728626 is an apocalyptic number.

70728626 is a deficient number, since it is larger than the sum of its proper divisors (35748154).

70728626 is a wasteful number, since it uses less digits than its factorization.

70728626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127948.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 70728626 is about 8410.0312722367. The cubic root of 70728626 is about 413.5535378559.

The spelling of 70728626 in words is "seventy million, seven hundred twenty-eight thousand, six hundred twenty-six".