71949568 has 18 divisors (see below), whose sum is σ = 143618594. Its totient is φ = 35974656.

The previous prime is 71949557. The next prime is 71949569. The reversal of 71949568 is 86594917.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 18249984 = 7328^2 + 4272^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71949569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140271 + ... + 140782.

Almost surely, 2^71949568 is an apocalyptic number.

It is an amenable number.

71949568 is a deficient number, since it is larger than the sum of its proper divisors (71669026).

71949568 is an equidigital number, since it uses as much as digits as its factorization.

71949568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281069 (or 281055 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 71949568 is about 8482.3091195735. The cubic root of 71949568 is about 415.9196097125.

The spelling of 71949568 in words is "seventy-one million, nine hundred forty-nine thousand, five hundred sixty-eight".