4571640 has 160 divisors (see below), whose sum is σ = 16465680. Its totient is φ = 1133568.

The previous prime is 4571629. The next prime is 4571681. The reversal of 4571640 is 461754.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55039 + ... + 55121.

Almost surely, 2^4571640 is an apocalyptic number.

4571640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4571640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8232840).

4571640 is an abundant number, since it is smaller than the sum of its proper divisors (11894040).

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

4571640 is a wasteful number, since it uses less digits than its factorization.

4571640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 4571640 is about 2138.1393780575. The cubic root of 4571640 is about 165.9678652656.

The spelling of 4571640 in words is "four million, five hundred seventy-one thousand, six hundred forty".