53662644 has 108 divisors (see below), whose sum is σ = 163390500. Its totient is φ = 14789376.

The previous prime is 53662621. The next prime is 53662649. The reversal of 53662644 is 44626635.

53662644 is a `hidden beast` number, since 5 + 3 + 6 + 6 + 2 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39690000 + 13972644 = 6300^2 + 3738^2 .

It is a super-2 number, since 2×53662644² = 5759358722141472, which contains 22 as substring.

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 = 53662599 and 53662608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53662649) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50632 + ... + 51680.

It is an arithmetic number, because the mean of its divisors is an integer number (1512875).

Almost surely, 2^53662644 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 53662644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81695250).

53662644 is an abundant number, since it is smaller than the sum of its proper divisors (109727856).

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

53662644 is a wasteful number, since it uses less digits than its factorization.

53662644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102 (or 1090 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 53662644 is about 7325.4790969601. The cubic root of 53662644 is about 377.1875554559.

The spelling of 53662644 in words is "fifty-three million, six hundred sixty-two thousand, six hundred forty-four".