533640240 has 240 divisors, whose sum is σ = 2068492608. Its totient is φ = 120766464.

The previous prime is 533640229. The next prime is 533640241. The reversal of 533640240 is 42046335.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (533640241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 569052 + ... + 569988.

Almost surely, 2^533640240 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 533640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034246304).

533640240 is an abundant number, since it is smaller than the sum of its proper divisors (1534852368).

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

533640240 is a wasteful number, since it uses less digits than its factorization.

533640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 533640240 is about 23100.6545361814. The cubic root of 533640240 is about 811.1157919429.

Adding to 533640240 its reverse (42046335), we get a palindrome (575686575).

The spelling of 533640240 in words is "five hundred thirty-three million, six hundred forty thousand, two hundred forty".