54720240 has 160 divisors (see below), whose sum is σ = 178488576. Its totient is φ = 13854720.

The previous prime is 54720131. The next prime is 54720251. The reversal of 54720240 is 4202745.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 54720240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659239 + ... + 659321.

Almost surely, 2^54720240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54720240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89244288).

54720240 is an abundant number, since it is smaller than the sum of its proper divisors (123768336).

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

54720240 is a wasteful number, since it uses less digits than its factorization.

54720240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 54720240 is about 7397.3130256871. The cubic root of 54720240 is about 379.6493533625.

Adding to 54720240 its reverse (4202745), we get a palindrome (58922985).

The spelling of 54720240 in words is "fifty-four million, seven hundred twenty thousand, two hundred forty".