71280964 has 12 divisors (see below), whose sum is σ = 125193964. Its totient is φ = 35511264.

The previous prime is 71280959. The next prime is 71280967. The reversal of 71280964 is 46908217.

It can be written as a sum of positive squares in 2 ways, for example, as 45697600 + 25583364 = 6760^2 + 5058^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71280967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31059 + ... + 33274.

Almost surely, 2^71280964 is an apocalyptic number.

It is an amenable number.

71280964 is a deficient number, since it is larger than the sum of its proper divisors (53913000).

71280964 is a wasteful number, since it uses less digits than its factorization.

71280964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64614 (or 64612 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 71280964 is about 8442.8054579032. The cubic root of 71280964 is about 414.6272629415.

The spelling of 71280964 in words is "seventy-one million, two hundred eighty thousand, nine hundred sixty-four".