53405540 has 24 divisors (see below), whose sum is σ = 117028800. Its totient is φ = 20433248.

The previous prime is 53405537. The next prime is 53405549. The reversal of 53405540 is 4550435.

It is not an unprimeable number, because it can be changed into a prime (53405549) 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, 57590 + ... + 58509.

It is an arithmetic number, because the mean of its divisors is an integer number (4876200).

Almost surely, 2^53405540 is an apocalyptic number.

It is an amenable number.

53405540 is an abundant number, since it is smaller than the sum of its proper divisors (63623260).

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

53405540 is a wasteful number, since it uses less digits than its factorization.

53405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116131 (or 116129 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 53405540 is about 7307.9094137790. The cubic root of 53405540 is about 376.5842076350.

Adding to 53405540 its reverse (4550435), we get a palindrome (57955975).

The spelling of 53405540 in words is "fifty-three million, four hundred five thousand, five hundred forty".