55590438 has 8 divisors (see below), whose sum is σ = 111180888. Its totient is φ = 18530144.

The previous prime is 55590433. The next prime is 55590461. The reversal of 55590438 is 83409555.

It is a sphenic number, since it is the product of 3 distinct primes.

55590438 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55590396 and 55590405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55590433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632531 + ... + 4632542.

It is an arithmetic number, because the mean of its divisors is an integer number (13897611).

Almost surely, 2^55590438 is an apocalyptic number.

55590438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55590438 is a wasteful number, since it uses less digits than its factorization.

55590438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265078.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 55590438 is about 7455.8995433147. The cubic root of 55590438 is about 381.6512583378.

The spelling of 55590438 in words is "fifty-five million, five hundred ninety thousand, four hundred thirty-eight".