71544730 has 16 divisors (see below), whose sum is σ = 128914920. Its totient is φ = 28588032.

The previous prime is 71544719. The next prime is 71544731. The reversal of 71544730 is 3744517.

It can be written as a sum of positive squares in 4 ways, for example, as 35796289 + 35748441 = 5983^2 + 5979^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71544692 and 71544701.

It is not an unprimeable number, because it can be changed into a prime (71544731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8122 + ... + 14458.

Almost surely, 2^71544730 is an apocalyptic number.

71544730 is a deficient number, since it is larger than the sum of its proper divisors (57370190).

71544730 is a wasteful number, since it uses less digits than its factorization.

71544730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 71544730 is about 8458.4117894555. The cubic root of 71544730 is about 415.1380582911.

The spelling of 71544730 in words is "seventy-one million, five hundred forty-four thousand, seven hundred thirty".