71445770 has 16 divisors (see below), whose sum is σ = 140293728. Its totient is φ = 25980240.

The previous prime is 71445767. The next prime is 71445799. The reversal of 71445770 is 7754417.

It is a self number, because there is not a number n which added to its sum of digits gives 71445770.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324644 + ... + 324863.

It is an arithmetic number, because the mean of its divisors is an integer number (8768358).

Almost surely, 2^71445770 is an apocalyptic number.

71445770 is a deficient number, since it is larger than the sum of its proper divisors (68847958).

71445770 is a wasteful number, since it uses less digits than its factorization.

71445770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649525.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 71445770 is about 8452.5599672525. The cubic root of 71445770 is about 414.9465649495.

The spelling of 71445770 in words is "seventy-one million, four hundred forty-five thousand, seven hundred seventy".