71450240 has 32 divisors (see below), whose sum is σ = 170812260. Its totient is φ = 28579840.

The previous prime is 71450237. The next prime is 71450273. The reversal of 71450240 is 4205417.

It can be written as a sum of positive squares in 2 ways, for example, as 69622336 + 1827904 = 8344^2 + 1352^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55181 + ... + 56460.

Almost surely, 2^71450240 is an apocalyptic number.

It is an amenable number.

71450240 is an abundant number, since it is smaller than the sum of its proper divisors (99362020).

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

71450240 is a wasteful number, since it uses less digits than its factorization.

71450240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111660 (or 111648 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 71450240 is about 8452.8243800519. The cubic root of 71450240 is about 414.9552184708.

Adding to 71450240 its reverse (4205417), we get a palindrome (75655657).

The spelling of 71450240 in words is "seventy-one million, four hundred fifty thousand, two hundred forty".