71070320 has 40 divisors (see below), whose sum is σ = 166130736. Its totient is φ = 28274688.

The previous prime is 71070287. The next prime is 71070331. The reversal of 71070320 is 2307017.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 71070292 and 71070301.

It is a congruent number.

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, 13139 + ... + 17741.

Almost surely, 2^71070320 is an apocalyptic number.

It is an amenable number.

71070320 is an abundant number, since it is smaller than the sum of its proper divisors (95060416).

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

71070320 is a wasteful number, since it uses less digits than its factorization.

71070320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809 (or 4803 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 71070320 is about 8430.3214648079. The cubic root of 71070320 is about 414.2184351422.

Adding to 71070320 its reverse (2307017), we get a palindrome (73377337).

The spelling of 71070320 in words is "seventy-one million, seventy thousand, three hundred twenty".