71870320 has 40 divisors (see below), whose sum is σ = 167471424. Its totient is φ = 28684032.

The previous prime is 71870311. The next prime is 71870321. The reversal of 71870320 is 2307817.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71870321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53497 + ... + 54823.

Almost surely, 2^71870320 is an apocalyptic number.

It is an amenable number.

71870320 is an abundant number, since it is smaller than the sum of its proper divisors (95601104).

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

71870320 is a wasteful number, since it uses less digits than its factorization.

71870320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 71870320 is about 8477.6364630715. The cubic root of 71870320 is about 415.7668503701.

The spelling of 71870320 in words is "seventy-one million, eight hundred seventy thousand, three hundred twenty".