8144420 has 12 divisors (see below), whose sum is σ = 17103324. Its totient is φ = 3257760.

The previous prime is 8144399. The next prime is 8144429. The reversal of 8144420 is 244418.

It can be written as a sum of positive squares in 2 ways, for example, as 1290496 + 6853924 = 1136^2 + 2618^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8144429) 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, 203591 + ... + 203630.

It is an arithmetic number, because the mean of its divisors is an integer number (1425277).

Almost surely, 2^8144420 is an apocalyptic number.

It is an amenable number.

8144420 is an abundant number, since it is smaller than the sum of its proper divisors (8958904).

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

8144420 is a wasteful number, since it uses less digits than its factorization.

8144420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407230 (or 407228 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 8144420 is about 2853.8430230130. The cubic root of 8144420 is about 201.1963297079.

Adding to 8144420 its reverse (244418), we get a palindrome (8388838).

The spelling of 8144420 in words is "eight million, one hundred forty-four thousand, four hundred twenty".