55387828 has 24 divisors (see below), whose sum is σ = 98908992. Its totient is φ = 27132864.

The previous prime is 55387823. The next prime is 55387837. The reversal of 55387828 is 82878355.

55387828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55387828² = 6135622981115168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55387823) 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, 62001 + ... + 62887.

It is an arithmetic number, because the mean of its divisors is an integer number (4121208).

Almost surely, 2^55387828 is an apocalyptic number.

It is an amenable number.

55387828 is a deficient number, since it is larger than the sum of its proper divisors (43521164).

55387828 is a wasteful number, since it uses less digits than its factorization.

55387828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1189 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 55387828 is about 7442.2999133332. The cubic root of 55387828 is about 381.1870268470.

It can be divided in two parts, 5538 and 7828, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 55387828 in words is "fifty-five million, three hundred eighty-seven thousand, eight hundred twenty-eight".