52717644 has 72 divisors (see below), whose sum is σ = 155570688. Its totient is φ = 14738400.

The previous prime is 52717619. The next prime is 52717649. The reversal of 52717644 is 44671725.

52717644 is a `hidden beast` number, since 5 + 2 + 7 + 1 + 7 + 644 = 666.

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 = 52717599 and 52717608.

It is not an unprimeable number, because it can be changed into a prime (52717649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9619 + ... + 14069.

It is an arithmetic number, because the mean of its divisors is an integer number (2160704).

Almost surely, 2^52717644 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 52717644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77785344).

52717644 is an abundant number, since it is smaller than the sum of its proper divisors (102853044).

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

52717644 is a wasteful number, since it uses less digits than its factorization.

52717644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515 (or 4510 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 52717644 is about 7260.6917025859. The cubic root of 52717644 is about 374.9603371384.

It can be divided in two parts, 52717 and 644, that added together give a square (53361 = 231²).

The spelling of 52717644 in words is "fifty-two million, seven hundred seventeen thousand, six hundred forty-four".