565533440 has 72 divisors (see below), whose sum is σ = 1377026448. Its totient is φ = 222474240.

The previous prime is 565533439. The next prime is 565533481. The reversal of 565533440 is 44335565.

It is a self number, because there is not a number n which added to its sum of digits gives 565533440.

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, 74459 + ... + 81701.

Almost surely, 2^565533440 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 565533440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688513224).

565533440 is an abundant number, since it is smaller than the sum of its proper divisors (811493008).

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

565533440 is an equidigital number, since it uses as much as digits as its factorization.

565533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7325 (or 7311 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

The square root of 565533440 is about 23780.9469954415. The cubic root of 565533440 is about 826.9630339844.

It can be divided in two parts, 5 and 65533440, that multiplied together give a triangular number (327667200 = T₂₅₅₉₉).

The spelling of 565533440 in words is "five hundred sixty-five million, five hundred thirty-three thousand, four hundred forty".