838560564 has 36 divisors (see below), whose sum is σ = 2244384324. Its totient is φ = 263077632.

The previous prime is 838560559. The next prime is 838560599. The reversal of 838560564 is 465065838.

838560564 is a `hidden beast` number, since 8 + 3 + 85 + 6 + 0 + 564 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 238702500 + 599858064 = 15450^2 + 24492^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684487 + ... + 685710.

It is an arithmetic number, because the mean of its divisors is an integer number (62344009).

Almost surely, 2^838560564 is an apocalyptic number.

It is an amenable number.

838560564 is an abundant number, since it is smaller than the sum of its proper divisors (1405823760).

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

838560564 is a wasteful number, since it uses less digits than its factorization.

838560564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370224 (or 1370219 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 838560564 is about 28957.9102146546. The cubic root of 838560564 is about 942.9995340635. Note that the first 3 decimals are identical.

The spelling of 838560564 in words is "eight hundred thirty-eight million, five hundred sixty thousand, five hundred sixty-four".