55389638 has 8 divisors (see below), whose sum is σ = 87971832. Its totient is φ = 26065696.

The previous prime is 55389571. The next prime is 55389661. The reversal of 55389638 is 83698355.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 55389592 and 55389601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814520 + ... + 814587.

It is an arithmetic number, because the mean of its divisors is an integer number (10996479).

Almost surely, 2^55389638 is an apocalyptic number.

55389638 is a deficient number, since it is larger than the sum of its proper divisors (32582194).

55389638 is a wasteful number, since it uses less digits than its factorization.

55389638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629126.

The product of its digits is 777600, while the sum is 47.

The square root of 55389638 is about 7442.4215145341. The cubic root of 55389638 is about 381.1911790289.

The spelling of 55389638 in words is "fifty-five million, three hundred eighty-nine thousand, six hundred thirty-eight".