55047384 has 128 divisors (see below), whose sum is σ = 178560000. Its totient is φ = 15706656.

The previous prime is 55047383. The next prime is 55047397. The reversal of 55047384 is 48374055.

55047384 is a `hidden beast` number, since 5 + 504 + 73 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55047383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73717 + ... + 74459.

It is an arithmetic number, because the mean of its divisors is an integer number (1395000).

Almost surely, 2^55047384 is an apocalyptic number.

55047384 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55047384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89280000).

55047384 is an abundant number, since it is smaller than the sum of its proper divisors (123512616).

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

55047384 is a wasteful number, since it uses less digits than its factorization.

55047384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 55047384 is about 7419.3924279553. The cubic root of 55047384 is about 380.4044263036.

The spelling of 55047384 in words is "fifty-five million, forty-seven thousand, three hundred eighty-four".