4539640 has 64 divisors (see below), whose sum is σ = 12072960. Its totient is φ = 1503360.

The previous prime is 4539617. The next prime is 4539649. The reversal of 4539640 is 469354.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4539649) 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, 8419 + ... + 8941.

It is an arithmetic number, because the mean of its divisors is an integer number (188640).

Almost surely, 2^4539640 is an apocalyptic number.

4539640 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 4539640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6036480).

4539640 is an abundant number, since it is smaller than the sum of its proper divisors (7533320).

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

4539640 is a wasteful number, since it uses less digits than its factorization.

4539640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 4539640 is about 2130.6430954057. The cubic root of 4539640 is about 165.5797177740.

The spelling of 4539640 in words is "four million, five hundred thirty-nine thousand, six hundred forty".