55238418 has 48 divisors (see below), whose sum is σ = 122649696. Its totient is φ = 17962560.

The previous prime is 55238399. The next prime is 55238419. The reversal of 55238418 is 81483255.

It is a happy number.

55238418 is a `hidden beast` number, since 5 + 5 + 238 + 418 = 666.

It is not an unprimeable number, because it can be changed into a prime (55238419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196438 + ... + 196718.

It is an arithmetic number, because the mean of its divisors is an integer number (2555202).

Almost surely, 2^55238418 is an apocalyptic number.

55238418 is an abundant number, since it is smaller than the sum of its proper divisors (67411278).

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

55238418 is a wasteful number, since it uses less digits than its factorization.

55238418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 516 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 55238418 is about 7432.2552431950. The cubic root of 55238418 is about 380.8439644603.

The spelling of 55238418 in words is "fifty-five million, two hundred thirty-eight thousand, four hundred eighteen".