70309628 has 6 divisors (see below), whose sum is σ = 123041856. Its totient is φ = 35154812.

The previous prime is 70309627. The next prime is 70309639. The reversal of 70309628 is 82690307.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70309627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8788700 + ... + 8788707.

It is an arithmetic number, because the mean of its divisors is an integer number (20506976).

Almost surely, 2^70309628 is an apocalyptic number.

It is an amenable number.

70309628 is a deficient number, since it is larger than the sum of its proper divisors (52732228).

70309628 is a wasteful number, since it uses less digits than its factorization.

70309628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17577411 (or 17577409 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 70309628 is about 8385.0836608826. The cubic root of 70309628 is about 412.7352863997.

The spelling of 70309628 in words is "seventy million, three hundred nine thousand, six hundred twenty-eight".