53403444 has 18 divisors (see below), whose sum is σ = 134992130. Its totient is φ = 17801136.

The previous prime is 53403419. The next prime is 53403451. The reversal of 53403444 is 44430435.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 22467600 = 5562^2 + 4740^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×53403444² = 5703855662122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 741679 + ... + 741750.

Almost surely, 2^53403444 is an apocalyptic number.

It is an amenable number.

53403444 is an abundant number, since it is smaller than the sum of its proper divisors (81588686).

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

53403444 is a wasteful number, since it uses less digits than its factorization.

53403444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483439 (or 1483434 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 53403444 is about 7307.7660061061. The cubic root of 53403444 is about 376.5792809874.

Adding to 53403444 its reverse (44430435), we get a palindrome (97833879).

The spelling of 53403444 in words is "fifty-three million, four hundred three thousand, four hundred forty-four".