71729572 has 6 divisors (see below), whose sum is σ = 125526758. Its totient is φ = 35864784.

The previous prime is 71729533. The next prime is 71729573. The reversal of 71729572 is 27592717.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57395776 + 14333796 = 7576^2 + 3786^2 .

It is not an unprimeable number, because it can be changed into a prime (71729573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8966193 + ... + 8966200.

Almost surely, 2^71729572 is an apocalyptic number.

It is an amenable number.

71729572 is a deficient number, since it is larger than the sum of its proper divisors (53797186).

71729572 is a wasteful number, since it uses less digits than its factorization.

71729572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17932397 (or 17932395 counting only the distinct ones).

The product of its digits is 61740, while the sum is 40.

The square root of 71729572 is about 8469.3312604951. The cubic root of 71729572 is about 415.4952658724.

The spelling of 71729572 in words is "seventy-one million, seven hundred twenty-nine thousand, five hundred seventy-two".