8561408 has 36 divisors (see below), whose sum is σ = 17439408. Its totient is φ = 4193280.

The previous prime is 8561407. The next prime is 8561417. The reversal of 8561408 is 8041658.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (8561407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13253 + ... + 13883.

It is an arithmetic number, because the mean of its divisors is an integer number (484428).

Almost surely, 2^8561408 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 8561408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8719704).

8561408 is an abundant number, since it is smaller than the sum of its proper divisors (8878000).

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

8561408 is an equidigital number, since it uses as much as digits as its factorization.

8561408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 8561408 is about 2925.9883800179. The cubic root of 8561408 is about 204.5730395898.

The spelling of 8561408 in words is "eight million, five hundred sixty-one thousand, four hundred eight".