4558640 has 20 divisors (see below), whose sum is σ = 10599024. Its totient is φ = 1823424.

The previous prime is 4558639. The next prime is 4558649. The reversal of 4558640 is 468554.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 4558597 and 4558606.

It is not an unprimeable number, because it can be changed into a prime (4558649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28412 + ... + 28571.

Almost surely, 2^4558640 is an apocalyptic number.

4558640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4558640 is an abundant number, since it is smaller than the sum of its proper divisors (6040384).

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

4558640 is a wasteful number, since it uses less digits than its factorization.

4558640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56996 (or 56990 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 4558640 is about 2135.0971874835. The cubic root of 4558640 is about 165.8103994839.

It can be divided in two parts, 45 and 58640, that added together give a palindrome (58685).

The spelling of 4558640 in words is "four million, five hundred fifty-eight thousand, six hundred forty".