30255540 has 144 divisors (see below), whose sum is σ = 101352384. Its totient is φ = 6720000.

The previous prime is 30255539. The next prime is 30255541. The reversal of 30255540 is 4555203.

It is an interprime number because it is at equal distance from previous prime (30255539) and next prime (30255541).

It is a self number, because there is not a number n which added to its sum of digits gives 30255540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30255541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120415 + ... + 120665.

It is an arithmetic number, because the mean of its divisors is an integer number (703836).

Almost surely, 2^30255540 is an apocalyptic number.

30255540 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 30255540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50676192).

30255540 is an abundant number, since it is smaller than the sum of its proper divisors (71096844).

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

30255540 is a wasteful number, since it uses less digits than its factorization.

30255540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 30255540 is about 5500.5036133067. The cubic root of 30255540 is about 311.6030042725.

The spelling of 30255540 in words is "thirty million, two hundred fifty-five thousand, five hundred forty".