63571240 has 16 divisors (see below), whose sum is σ = 143035380. Its totient is φ = 25428480.

The previous prime is 63571237. The next prime is 63571253. The reversal of 63571240 is 4217536.

It can be written as a sum of positive squares in 2 ways, for example, as 58400164 + 5171076 = 7642^2 + 2274^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63571199 and 63571208.

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, 794601 + ... + 794680.

Almost surely, 2^63571240 is an apocalyptic number.

It is an amenable number.

63571240 is an abundant number, since it is smaller than the sum of its proper divisors (79464140).

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

63571240 is a wasteful number, since it uses less digits than its factorization.

63571240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589292 (or 1589288 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 63571240 is about 7973.1574674027. The cubic root of 63571240 is about 399.1047478036.

Adding to 63571240 its reverse (4217536), we get a palindrome (67788776).

The spelling of 63571240 in words is "sixty-three million, five hundred seventy-one thousand, two hundred forty".