55378272 has 48 divisors (see below), whose sum is σ = 146301120. Its totient is φ = 18340992.

The previous prime is 55378237. The next prime is 55378283. The reversal of 55378272 is 27287355.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 55378272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13879 + ... + 17417.

It is an arithmetic number, because the mean of its divisors is an integer number (3047940).

Almost surely, 2^55378272 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 55378272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73150560).

55378272 is an abundant number, since it is smaller than the sum of its proper divisors (90922848).

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

55378272 is a wasteful number, since it uses less digits than its factorization.

55378272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715 (or 3707 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 55378272 is about 7441.6578798007. The cubic root of 55378272 is about 381.1651036624.

The spelling of 55378272 in words is "fifty-five million, three hundred seventy-eight thousand, two hundred seventy-two".