53004440 has 16 divisors (see below), whose sum is σ = 119260080. Its totient is φ = 21201760.

The previous prime is 53004409. The next prime is 53004449. The reversal of 53004440 is 4440035.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53004449) 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, 662516 + ... + 662595.

It is an arithmetic number, because the mean of its divisors is an integer number (7453755).

Almost surely, 2^53004440 is an apocalyptic number.

It is an amenable number.

53004440 is an abundant number, since it is smaller than the sum of its proper divisors (66255640).

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

53004440 is a wasteful number, since it uses less digits than its factorization.

53004440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325122 (or 1325118 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 53004440 is about 7280.4148233463. The cubic root of 53004440 is about 375.6390643800.

Adding to 53004440 its reverse (4440035), we get a palindrome (57444475).

The spelling of 53004440 in words is "fifty-three million, four thousand, four hundred forty".