70531628 has 6 divisors (see below), whose sum is σ = 123430356. Its totient is φ = 35265812.

The previous prime is 70531627. The next prime is 70531649. The reversal of 70531628 is 82613507.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 70531594 and 70531603.

It is not an unprimeable number, because it can be changed into a prime (70531627) 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 as a sum of consecutive naturals, namely, 8816450 + ... + 8816457.

It is an arithmetic number, because the mean of its divisors is an integer number (20571726).

Almost surely, 2^70531628 is an apocalyptic number.

It is an amenable number.

70531628 is a deficient number, since it is larger than the sum of its proper divisors (52898728).

70531628 is a wasteful number, since it uses less digits than its factorization.

70531628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17632911 (or 17632909 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 70531628 is about 8398.3110206755. The cubic root of 70531628 is about 413.1692287036.

The spelling of 70531628 in words is "seventy million, five hundred thirty-one thousand, six hundred twenty-eight".