55040024 has 32 divisors (see below), whose sum is σ = 111978720. Its totient is φ = 25211136.

The previous prime is 55039991. The next prime is 55040059. The reversal of 55040024 is 42004055.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55039978 and 55040005.

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, 12317 + ... + 16179.

It is an arithmetic number, because the mean of its divisors is an integer number (3499335).

Almost surely, 2^55040024 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 55040024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55989360).

55040024 is an abundant number, since it is smaller than the sum of its proper divisors (56938696).

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

55040024 is a wasteful number, since it uses less digits than its factorization.

55040024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 55040024 is about 7418.8964138880. The cubic root of 55040024 is about 380.3874718112.

Adding to 55040024 its reverse (42004055), we get a palindrome (97044079).

The spelling of 55040024 in words is "fifty-five million, forty thousand, twenty-four".