54040240 has 40 divisors (see below), whose sum is σ = 126049968. Its totient is φ = 21546240.

The previous prime is 54040219. The next prime is 54040249. The reversal of 54040240 is 4204045.

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

It is not an unprimeable number, because it can be changed into a prime (54040249) 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, 28935 + ... + 30745.

Almost surely, 2^54040240 is an apocalyptic number.

It is an amenable number.

54040240 is an abundant number, since it is smaller than the sum of its proper divisors (72009728).

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

54040240 is a wasteful number, since it uses less digits than its factorization.

54040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 54040240 is about 7351.2067036644. The cubic root of 54040240 is about 378.0701791070.

Adding to 54040240 its reverse (4204045), we get a palindrome (58244285).

The spelling of 54040240 in words is "fifty-four million, forty thousand, two hundred forty".