55240638 has 64 divisors (see below), whose sum is σ = 121651200. Its totient is φ = 16662240.

The previous prime is 55240631. The next prime is 55240639. The reversal of 55240638 is 83604255.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55240599 and 55240608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55240631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289123 + ... + 289313.

It is an arithmetic number, because the mean of its divisors is an integer number (1900800).

Almost surely, 2^55240638 is an apocalyptic number.

55240638 is an abundant number, since it is smaller than the sum of its proper divisors (66410562).

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

55240638 is a wasteful number, since it uses less digits than its factorization.

55240638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 55240638 is about 7432.4045907095. The cubic root of 55240638 is about 380.8490663580.

The spelling of 55240638 in words is "fifty-five million, two hundred forty thousand, six hundred thirty-eight".