53649180 has 144 divisors (see below), whose sum is σ = 177768864. Its totient is φ = 13017600.

The previous prime is 53649173. The next prime is 53649209. The reversal of 53649180 is 8194635.

53649180 is a `hidden beast` number, since 5 + 3 + 649 + 1 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236227 + ... + 236453.

It is an arithmetic number, because the mean of its divisors is an integer number (1234506).

Almost surely, 2^53649180 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 53649180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88884432).

53649180 is an abundant number, since it is smaller than the sum of its proper divisors (124119684).

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

53649180 is a wasteful number, since it uses less digits than its factorization.

53649180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 53649180 is about 7324.5600550477. The cubic root of 53649180 is about 377.1560072648.

The spelling of 53649180 in words is "fifty-three million, six hundred forty-nine thousand, one hundred eighty".