71630240 has 48 divisors (see below), whose sum is σ = 184615200. Its totient is φ = 26046720.

The previous prime is 71630233. The next prime is 71630263. The reversal of 71630240 is 4203617.

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, 18590 + ... + 22109.

It is an arithmetic number, because the mean of its divisors is an integer number (3846150).

Almost surely, 2^71630240 is an apocalyptic number.

It is an amenable number.

71630240 is an abundant number, since it is smaller than the sum of its proper divisors (112984960).

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

71630240 is a wasteful number, since it uses less digits than its factorization.

71630240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40725 (or 40717 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 71630240 is about 8463.4650114477. The cubic root of 71630240 is about 415.3033829405.

Adding to 71630240 its reverse (4203617), we get a palindrome (75833857).

The spelling of 71630240 in words is "seventy-one million, six hundred thirty thousand, two hundred forty".