55386672 has 80 divisors (see below), whose sum is σ = 164334720. Its totient is φ = 15897600.

The previous prime is 55386659. The next prime is 55386673. The reversal of 55386672 is 27668355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55386673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7272 + ... + 12792.

It is an arithmetic number, because the mean of its divisors is an integer number (2054184).

Almost surely, 2^55386672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55386672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82167360).

55386672 is an abundant number, since it is smaller than the sum of its proper divisors (108948048).

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

55386672 is a wasteful number, since it uses less digits than its factorization.

55386672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562 (or 5556 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 55386672 is about 7442.2222487641. Note that the first 4 decimals coincide. The cubic root of 55386672 is about 381.1843749089.

The spelling of 55386672 in words is "fifty-five million, three hundred eighty-six thousand, six hundred seventy-two".