30545240 has 48 divisors (see below), whose sum is σ = 75554640. Its totient is φ = 11105600.

The previous prime is 30545237. The next prime is 30545267. The reversal of 30545240 is 4254503.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1685 + ... + 7995.

It is an arithmetic number, because the mean of its divisors is an integer number (1574055).

Almost surely, 2^30545240 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 30545240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37777320).

30545240 is an abundant number, since it is smaller than the sum of its proper divisors (45009400).

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

30545240 is a wasteful number, since it uses less digits than its factorization.

30545240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 30545240 is about 5526.7748280530. The cubic root of 30545240 is about 312.5943906864.

Adding to 30545240 its reverse (4254503), we get a palindrome (34799743).

The spelling of 30545240 in words is "thirty million, five hundred forty-five thousand, two hundred forty".