30503540 has 24 divisors (see below), whose sum is σ = 65790312. Its totient is φ = 11871360.

The previous prime is 30503527. The next prime is 30503573. The reversal of 30503540 is 4530503.

It can be written as a sum of positive squares in 4 ways, for example, as 3857296 + 26646244 = 1964^2 + 5162^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19871 + ... + 21350.

It is an arithmetic number, because the mean of its divisors is an integer number (2741263).

Almost surely, 2^30503540 is an apocalyptic number.

It is an amenable number.

30503540 is an abundant number, since it is smaller than the sum of its proper divisors (35286772).

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

30503540 is a wasteful number, since it uses less digits than its factorization.

30503540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41267 (or 41265 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 30503540 is about 5523.0009958355. Note that the first 3 decimals coincide. The cubic root of 30503540 is about 312.4520758509.

The spelling of 30503540 in words is "thirty million, five hundred three thousand, five hundred forty".