53187444 has 36 divisors (see below), whose sum is σ = 138785920. Its totient is φ = 17156880.

The previous prime is 53187427. The next prime is 53187457. The reversal of 53187444 is 44478135.

53187444 is a `hidden beast` number, since 531 + 87 + 4 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 53187399 and 53187408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22714 + ... + 24945.

Almost surely, 2^53187444 is an apocalyptic number.

It is an amenable number.

53187444 is an abundant number, since it is smaller than the sum of its proper divisors (85598476).

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

53187444 is a wasteful number, since it uses less digits than its factorization.

53187444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47700 (or 47695 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 53187444 is about 7292.9722335958. The cubic root of 53187444 is about 376.0708803299.

The spelling of 53187444 in words is "fifty-three million, one hundred eighty-seven thousand, four hundred forty-four".