71157320 has 32 divisors (see below), whose sum is σ = 172420920. Its totient is φ = 26273280.

The previous prime is 71157319. The next prime is 71157347. The reversal of 71157320 is 2375117.

It can be written as a sum of positive squares in 4 ways, for example, as 51638596 + 19518724 = 7186^2 + 4418^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 71157320.

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, 67901 + ... + 68940.

Almost surely, 2^71157320 is an apocalyptic number.

It is an amenable number.

71157320 is an abundant number, since it is smaller than the sum of its proper divisors (101263600).

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

71157320 is a wasteful number, since it uses less digits than its factorization.

71157320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136865 (or 136861 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 71157320 is about 8435.4798322324. The cubic root of 71157320 is about 414.3873866308.

The spelling of 71157320 in words is "seventy-one million, one hundred fifty-seven thousand, three hundred twenty".