55387120 has 40 divisors (see below), whose sum is σ = 131214816. Its totient is φ = 21735168.

The previous prime is 55387093. The next prime is 55387127. The reversal of 55387120 is 2178355.

55387120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55387127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2292 + ... + 10771.

Almost surely, 2^55387120 is an apocalyptic number.

It is an amenable number.

55387120 is an abundant number, since it is smaller than the sum of its proper divisors (75827696).

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

55387120 is a wasteful number, since it uses less digits than its factorization.

55387120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13129 (or 13123 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 55387120 is about 7442.2523472400. The cubic root of 55387120 is about 381.1854026540.

The spelling of 55387120 in words is "fifty-five million, three hundred eighty-seven thousand, one hundred twenty".