55044240 has 40 divisors (see below), whose sum is σ = 170637888. Its totient is φ = 14678400.

The previous prime is 55044229. The next prime is 55044281. The reversal of 55044240 is 4244055.

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

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 55044240.

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, 114436 + ... + 114915.

Almost surely, 2^55044240 is an apocalyptic number.

It is an amenable number.

55044240 is an abundant number, since it is smaller than the sum of its proper divisors (115593648).

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

55044240 is a wasteful number, since it uses less digits than its factorization.

55044240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229367 (or 229361 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 55044240 is about 7419.1805477425. The cubic root of 55044240 is about 380.3971839717.

Adding to 55044240 its reverse (4244055), we get a palindrome (59288295).

The spelling of 55044240 in words is "fifty-five million, forty-four thousand, two hundred forty".