30055830 has 64 divisors (see below), whose sum is σ = 87298560. Its totient is φ = 6465024.

The previous prime is 30055819. The next prime is 30055841. The reversal of 30055830 is 3855003.

It is an interprime number because it is at equal distance from previous prime (30055819) and next prime (30055841).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30055830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640 + ... + 7779.

It is an arithmetic number, because the mean of its divisors is an integer number (1364040).

Almost surely, 2^30055830 is an apocalyptic number.

30055830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30055830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43649280).

30055830 is an abundant number, since it is smaller than the sum of its proper divisors (57242730).

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

30055830 is a wasteful number, since it uses less digits than its factorization.

30055830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8453.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 30055830 is about 5482.3197644793. The cubic root of 30055830 is about 310.9158831382.

The spelling of 30055830 in words is "thirty million, fifty-five thousand, eight hundred thirty".