564973940 has 48 divisors (see below), whose sum is σ = 1230601680. Its totient is φ = 217620480.

The previous prime is 564973933. The next prime is 564973961. The reversal of 564973940 is 49379465.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 143328784 + 421645156 = 11972^2 + 20534^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266324 + ... + 268436.

It is an arithmetic number, because the mean of its divisors is an integer number (25637535).

Almost surely, 2^564973940 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 564973940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615300840).

564973940 is an abundant number, since it is smaller than the sum of its proper divisors (665627740).

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

564973940 is a wasteful number, since it uses less digits than its factorization.

564973940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 2610 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 564973940 is about 23769.1804654683. The cubic root of 564973940 is about 826.6902304967.

The spelling of 564973940 in words is "five hundred sixty-four million, nine hundred seventy-three thousand, nine hundred forty".