4400561 has 4 divisors (see below), whose sum is σ = 4800624. Its totient is φ = 4000500.

The previous prime is 4400551. The next prime is 4400587. The reversal of 4400561 is 1650044.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4400561 - 2⁶ = 4400497 is a prime.

It is a super-2 number, since 2×4400561² = 38729874229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4400551) 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, 200015 + ... + 200036.

It is an arithmetic number, because the mean of its divisors is an integer number (1200156).

Almost surely, 2^4400561 is an apocalyptic number.

It is an amenable number.

4400561 is a deficient number, since it is larger than the sum of its proper divisors (400063).

4400561 is a wasteful number, since it uses less digits than its factorization.

4400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400062.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 4400561 is about 2097.7514152063. The cubic root of 4400561 is about 163.8712180550.

The spelling of 4400561 in words is "four million, four hundred thousand, five hundred sixty-one".