53644668 has 48 divisors (see below), whose sum is σ = 156059904. Its totient is φ = 13933440.

The previous prime is 53644667. The next prime is 53644691. The reversal of 53644668 is 86644635.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53644667) 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, 28105 + ... + 29952.

It is an arithmetic number, because the mean of its divisors is an integer number (3251248).

Almost surely, 2^53644668 is an apocalyptic number.

It is an amenable number.

53644668 is an abundant number, since it is smaller than the sum of its proper divisors (102415236).

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

53644668 is a wasteful number, since it uses less digits than its factorization.

53644668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58082 (or 58080 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 53644668 is about 7324.2520437243. The cubic root of 53644668 is about 377.1454337847.

The spelling of 53644668 in words is "fifty-three million, six hundred forty-four thousand, six hundred sixty-eight".