438224861 has 16 divisors (see below), whose sum is σ = 469048320. Its totient is φ = 409408960.

The previous prime is 438224821. The next prime is 438224879. The reversal of 438224861 is 168422834.

It is a de Polignac number, because none of the positive numbers 2^k-438224861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438224821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 938150 + ... + 938616.

It is an arithmetic number, because the mean of its divisors is an integer number (29315520).

Almost surely, 2^438224861 is an apocalyptic number.

It is an amenable number.

438224861 is a deficient number, since it is larger than the sum of its proper divisors (30823459).

438224861 is an equidigital number, since it uses as much as digits as its factorization.

438224861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 675 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 438224861 is about 20933.8209842351. The cubic root of 438224861 is about 759.5662697158.

The spelling of 438224861 in words is "four hundred thirty-eight million, two hundred twenty-four thousand, eight hundred sixty-one".