71964724 has 12 divisors (see below), whose sum is σ = 135625924. Its totient is φ = 33214464.

The previous prime is 71964721. The next prime is 71964731. The reversal of 71964724 is 42746917.

It can be written as a sum of positive squares in 2 ways, for example, as 48052624 + 23912100 = 6932^2 + 4890^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71964721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691917 + ... + 692020.

Almost surely, 2^71964724 is an apocalyptic number.

It is an amenable number.

71964724 is a deficient number, since it is larger than the sum of its proper divisors (63661200).

71964724 is a wasteful number, since it uses less digits than its factorization.

71964724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383954 (or 1383952 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 71964724 is about 8483.2024613350. The cubic root of 71964724 is about 415.9488118106.

The spelling of 71964724 in words is "seventy-one million, nine hundred sixty-four thousand, seven hundred twenty-four".