54836640 has 144 divisors (see below), whose sum is σ = 189346248. Its totient is φ = 14450688.

The previous prime is 54836633. The next prime is 54836657. The reversal of 54836640 is 4663845.

54836640 is a `hidden beast` number, since 5 + 4 + 8 + 3 + 6 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20684304 + 34152336 = 4548^2 + 5844^2 .

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 54836595 and 54836604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162552 + ... + 162888.

Almost surely, 2^54836640 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 54836640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94673124).

54836640 is an abundant number, since it is smaller than the sum of its proper divisors (134509608).

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

54836640 is a wasteful number, since it uses less digits than its factorization.

54836640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 54836640 is about 7405.1765677801. The cubic root of 54836640 is about 379.9183573450.

The spelling of 54836640 in words is "fifty-four million, eight hundred thirty-six thousand, six hundred forty".