571161240 has 256 divisors, whose sum is σ = 2171836800. Its totient is φ = 132268032.

The previous prime is 571161233. The next prime is 571161259. The reversal of 571161240 is 42161175.

It is a happy number.

571161240 is a `hidden beast` number, since 5 + 7 + 1 + 1 + 612 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 237484 + ... + 239876.

Almost surely, 2^571161240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 571161240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085918400).

571161240 is an abundant number, since it is smaller than the sum of its proper divisors (1600675560).

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

571161240 is a wasteful number, since it uses less digits than its factorization.

571161240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2433 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 571161240 is about 23898.9798945478. The cubic root of 571161240 is about 829.6971072653.

The spelling of 571161240 in words is "five hundred seventy-one million, one hundred sixty-one thousand, two hundred forty".