71378320 has 40 divisors (see below), whose sum is σ = 178722936. Its totient is φ = 26354688.

The previous prime is 71378311. The next prime is 71378339. The reversal of 71378320 is 2387317.

It can be written as a sum of positive squares in 4 ways, for example, as 4596736 + 66781584 = 2144^2 + 8172^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33277 + ... + 35356.

Almost surely, 2^71378320 is an apocalyptic number.

It is an amenable number.

71378320 is an abundant number, since it is smaller than the sum of its proper divisors (107344616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71378320 is a wasteful number, since it uses less digits than its factorization.

71378320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68659 (or 68653 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 71378320 is about 8448.5691096185. The cubic root of 71378320 is about 414.8159439296.

The spelling of 71378320 in words is "seventy-one million, three hundred seventy-eight thousand, three hundred twenty".