53444220 has 24 divisors (see below), whose sum is σ = 149643984. Its totient is φ = 14251776.

The previous prime is 53444219. The next prime is 53444221. The reversal of 53444220 is 2244435.

It is an interprime number because it is at equal distance from previous prime (53444219) and next prime (53444221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53444221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445309 + ... + 445428.

It is an arithmetic number, because the mean of its divisors is an integer number (6235166).

Almost surely, 2^53444220 is an apocalyptic number.

It is an amenable number.

53444220 is an abundant number, since it is smaller than the sum of its proper divisors (96199764).

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

53444220 is a wasteful number, since it uses less digits than its factorization.

53444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890749 (or 890747 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 53444220 is about 7310.5553824590. Note that the first 3 decimals coincide. The cubic root of 53444220 is about 376.6751018377.

Adding to 53444220 its reverse (2244435), we get a palindrome (55688655).

The spelling of 53444220 in words is "fifty-three million, four hundred forty-four thousand, two hundred twenty".