8561394 has 48 divisors (see below), whose sum is σ = 19518720. Its totient is φ = 2708640.

The previous prime is 8561383. The next prime is 8561407. The reversal of 8561394 is 4931658.

8561394 is a `hidden beast` number, since 8 + 561 + 3 + 94 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37272 + ... + 37500.

It is an arithmetic number, because the mean of its divisors is an integer number (406640).

Almost surely, 2^8561394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8561394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9759360).

8561394 is an abundant number, since it is smaller than the sum of its proper divisors (10957326).

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

8561394 is a wasteful number, since it uses less digits than its factorization.

8561394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 332 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 8561394 is about 2925.9859876630. The cubic root of 8561394 is about 204.5729280808.

The spelling of 8561394 in words is "eight million, five hundred sixty-one thousand, three hundred ninety-four".