71830970 has 16 divisors (see below), whose sum is σ = 133754760. Its totient is φ = 27741504.

The previous prime is 71830961. The next prime is 71831009. The reversal of 71830970 is 7903817.

It can be written as a sum of positive squares in 4 ways, for example, as 63473089 + 8357881 = 7967^2 + 2891^2 .

It is a super-2 number, since 2×71830970² = 10319376502281800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71830970.

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 7 ways as a sum of consecutive naturals, for example, 123557 + ... + 124136.

Almost surely, 2^71830970 is an apocalyptic number.

71830970 is a deficient number, since it is larger than the sum of its proper divisors (61923790).

71830970 is a wasteful number, since it uses less digits than its factorization.

71830970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247729.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 71830970 is about 8475.3153333667. The cubic root of 71830970 is about 415.6909571394.

The spelling of 71830970 in words is "seventy-one million, eight hundred thirty thousand, nine hundred seventy".