30055780 has 24 divisors (see below), whose sum is σ = 64189440. Its totient is φ = 11818080.

The previous prime is 30055757. The next prime is 30055783. The reversal of 30055780 is 8755003.

It is a super-2 number, since 2×30055780² = 1806699822816800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30055783) 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 7 ways as a sum of consecutive naturals, for example, 11556 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (2674560).

Almost surely, 2^30055780 is an apocalyptic number.

It is an amenable number.

30055780 is an abundant number, since it is smaller than the sum of its proper divisors (34133660).

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

30055780 is a wasteful number, since it uses less digits than its factorization.

30055780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25539 (or 25537 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 30055780 is about 5482.3152043639. The cubic root of 30055780 is about 310.9157107279.

The spelling of 30055780 in words is "thirty million, fifty-five thousand, seven hundred eighty".