30380820 has 24 divisors (see below), whose sum is σ = 85066464. Its totient is φ = 8101536.

The previous prime is 30380809. The next prime is 30380827. The reversal of 30380820 is 2808303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30380827) 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, 253114 + ... + 253233.

It is an arithmetic number, because the mean of its divisors is an integer number (3544436).

Almost surely, 2^30380820 is an apocalyptic number.

30380820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30380820 is an abundant number, since it is smaller than the sum of its proper divisors (54685644).

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

30380820 is a wasteful number, since it uses less digits than its factorization.

30380820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506359 (or 506357 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 30380820 is about 5511.8798970950. The cubic root of 30380820 is about 312.0324999018.

The spelling of 30380820 in words is "thirty million, three hundred eighty thousand, eight hundred twenty".