30189520 has 20 divisors (see below), whose sum is σ = 70190820. Its totient is φ = 12075776.

The previous prime is 30189487. The next prime is 30189529. The reversal of 30189520 is 2598103.

It can be written as a sum of positive squares in 2 ways, for example, as 22505536 + 7683984 = 4744^2 + 2772^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×30189520² = 1822814235660800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30189529) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 188605 + ... + 188764.

It is an arithmetic number, because the mean of its divisors is an integer number (3509541).

Almost surely, 2^30189520 is an apocalyptic number.

It is an amenable number.

30189520 is an abundant number, since it is smaller than the sum of its proper divisors (40001300).

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

30189520 is a wasteful number, since it uses less digits than its factorization.

30189520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377382 (or 377376 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 30189520 is about 5494.4990672490. The cubic root of 30189520 is about 311.3761916868.

The spelling of 30189520 in words is "thirty million, one hundred eighty-nine thousand, five hundred twenty".