4000650 has 48 divisors (see below), whose sum is σ = 10044000. Its totient is φ = 1053760.

The previous prime is 4000649. The next prime is 4000651. The reversal of 4000650 is 560004.

4000650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4000649) and next prime (4000651).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (4000651) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 22261 + ... + 22439.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

Almost surely, 2^4000650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4000650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5022000).

4000650 is an abundant number, since it is smaller than the sum of its proper divisors (6043350).

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

4000650 is a wasteful number, since it uses less digits than its factorization.

4000650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 4000650 is about 2000.1624933990. The cubic root of 4000650 is about 158.7487031535.

Adding to 4000650 its reverse (560004), we get a palindrome (4560654).

The spelling of 4000650 in words is "four million, six hundred fifty", and thus it is an aban number.