52550640 has 80 divisors (see below), whose sum is σ = 181015200. Its totient is φ = 14012928.

The previous prime is 52550629. The next prime is 52550647. The reversal of 52550640 is 4605525.

52550640 is a `hidden beast` number, since 52 + 550 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52550647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10005 + ... + 14324.

It is an arithmetic number, because the mean of its divisors is an integer number (2262690).

Almost surely, 2^52550640 is an apocalyptic number.

It is an amenable number.

52550640 is an abundant number, since it is smaller than the sum of its proper divisors (128464560).

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

52550640 is a wasteful number, since it uses less digits than its factorization.

52550640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24351 (or 24339 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 52550640 is about 7249.1820228216. The cubic root of 52550640 is about 374.5639732115.

The spelling of 52550640 in words is "fifty-two million, five hundred fifty thousand, six hundred forty".