53471440 has 40 divisors (see below), whose sum is σ = 135625248. Its totient is φ = 19443840.

The previous prime is 53471437. The next prime is 53471459. The reversal of 53471440 is 4417435.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 53471399 and 53471408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29502 + ... + 31261.

Almost surely, 2^53471440 is an apocalyptic number.

It is an amenable number.

53471440 is an abundant number, since it is smaller than the sum of its proper divisors (82153808).

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

53471440 is a wasteful number, since it uses less digits than its factorization.

53471440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60787 (or 60781 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 53471440 is about 7312.4168371339. The cubic root of 53471440 is about 376.7390398780.

Adding to 53471440 its reverse (4417435), we get a palindrome (57888875).

The spelling of 53471440 in words is "fifty-three million, four hundred seventy-one thousand, four hundred forty".