55742238 has 24 divisors (see below), whose sum is σ = 127132200. Its totient is φ = 17602704.

The previous prime is 55742189. The next prime is 55742249. The reversal of 55742238 is 83224755.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81153 + ... + 81836.

It is an arithmetic number, because the mean of its divisors is an integer number (5297175).

Almost surely, 2^55742238 is an apocalyptic number.

55742238 is an abundant number, since it is smaller than the sum of its proper divisors (71389962).

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

55742238 is a wasteful number, since it uses less digits than its factorization.

55742238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163016 (or 163013 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 55742238 is about 7466.0724614753. The cubic root of 55742238 is about 381.9983324580.

The spelling of 55742238 in words is "fifty-five million, seven hundred forty-two thousand, two hundred thirty-eight".