6540030 has 72 divisors (see below), whose sum is σ = 19793592. Its totient is φ = 1493856.

The previous prime is 6540029. The next prime is 6540067. The reversal of 6540030 is 300456.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6539985 and 6540012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3669 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (274911).

Almost surely, 2^6540030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6540030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9896796).

6540030 is an abundant number, since it is smaller than the sum of its proper divisors (13253562).

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

6540030 is a wasteful number, since it uses less digits than its factorization.

6540030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 6540030 is about 2557.3482359663. The cubic root of 6540030 is about 187.0078828404.

Adding to 6540030 its reverse (300456), we get a palindrome (6840486).

The spelling of 6540030 in words is "six million, five hundred forty thousand, thirty".