53444430 has 96 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 12377088.

The previous prime is 53444423. The next prime is 53444459. The reversal of 53444430 is 3444435.

53444430 = T₂₄₉₉ + T₂₅₀₀ + ... + T₂₅₁₅.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53444394 and 53444403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18547 + ... + 21233.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^53444430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53444430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79252992).

53444430 is an abundant number, since it is smaller than the sum of its proper divisors (105061554).

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

53444430 is a wasteful number, since it uses less digits than its factorization.

53444430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2727 counting only the distinct ones).

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

The square root of 53444430 is about 7310.5697452387. The cubic root of 53444430 is about 376.6755951974.

Adding to 53444430 its reverse (3444435), we get a palindrome (56888865).

The spelling of 53444430 in words is "fifty-three million, four hundred forty-four thousand, four hundred thirty".