30047820 has 96 divisors (see below), whose sum is σ = 93623040. Its totient is φ = 7138560.

The previous prime is 30047813. The next prime is 30047833. The reversal of 30047820 is 2874003.

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, 34551 + ... + 35409.

It is an arithmetic number, because the mean of its divisors is an integer number (975240).

Almost surely, 2^30047820 is an apocalyptic number.

30047820 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 30047820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46811520).

30047820 is an abundant number, since it is smaller than the sum of its proper divisors (63575220).

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

30047820 is a wasteful number, since it uses less digits than its factorization.

30047820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30047820 is about 5481.5891856286. The cubic root of 30047820 is about 310.8882605716. Note that the first 3 decimals are identical.

The spelling of 30047820 in words is "thirty million, forty-seven thousand, eight hundred twenty".