30105540 has 96 divisors (see below), whose sum is σ = 94469760. Its totient is φ = 7959168.

The previous prime is 30105529. The next prime is 30105541. The reversal of 30105540 is 4550103.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30105541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106239 + ... + 106521.

It is an arithmetic number, because the mean of its divisors is an integer number (984060).

Almost surely, 2^30105540 is an apocalyptic number.

30105540 is a gapful number since it is divisible by the number (30) 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 30105540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47234880).

30105540 is an abundant number, since it is smaller than the sum of its proper divisors (64364220).

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

30105540 is a wasteful number, since it uses less digits than its factorization.

30105540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30105540 is about 5486.8515562206. The cubic root of 30105540 is about 311.0871989369.

Adding to 30105540 its reverse (4550103), we get a palindrome (34655643).

It can be divided in two parts, 30 and 105540, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 30105540 in words is "thirty million, one hundred five thousand, five hundred forty".