54240640 has 32 divisors (see below), whose sum is σ = 129670560. Its totient is φ = 21696000.

The previous prime is 54240623. The next prime is 54240653. The reversal of 54240640 is 4604245.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41736 + ... + 43015.

It is an arithmetic number, because the mean of its divisors is an integer number (4052205).

Almost surely, 2^54240640 is an apocalyptic number.

It is an amenable number.

54240640 is an abundant number, since it is smaller than the sum of its proper divisors (75429920).

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

54240640 is an equidigital number, since it uses as much as digits as its factorization.

54240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84770 (or 84758 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 54240640 is about 7364.8245057163. The cubic root of 54240640 is about 378.5369411700.

Adding to 54240640 its reverse (4604245), we get a palindrome (58844885).

The spelling of 54240640 in words is "fifty-four million, two hundred forty thousand, six hundred forty".