4640020 has 96 divisors (see below), whose sum is σ = 12773376. Its totient is φ = 1372800.

The previous prime is 4640017. The next prime is 4640057. The reversal of 4640020 is 200464.

It is a junction number, because it is equal to n+sod(n) for n = 4639976 and 4640003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35355 + ... + 35485.

It is an arithmetic number, because the mean of its divisors is an integer number (133056).

Almost surely, 2^4640020 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 4640020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6386688).

4640020 is an abundant number, since it is smaller than the sum of its proper divisors (8133356).

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

4640020 is a wasteful number, since it uses less digits than its factorization.

4640020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4640020 is about 2154.0705652323. The cubic root of 4640020 is about 166.7912579500.

Adding to 4640020 its reverse (200464), we get a palindrome (4840484).

The spelling of 4640020 in words is "four million, six hundred forty thousand, twenty".