30388020 has 48 divisors (see below), whose sum is σ = 91633920. Its totient is φ = 7479936.

The previous prime is 30388013. The next prime is 30388021. The reversal of 30388020 is 2088303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30388021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18700 + ... + 20259.

It is an arithmetic number, because the mean of its divisors is an integer number (1909040).

Almost surely, 2^30388020 is an apocalyptic number.

30388020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30388020 is an abundant number, since it is smaller than the sum of its proper divisors (61245900).

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

30388020 is a wasteful number, since it uses less digits than its factorization.

30388020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38984 (or 38982 counting only the distinct ones).

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

The square root of 30388020 is about 5512.5329930985. The cubic root of 30388020 is about 312.0571476515.

The spelling of 30388020 in words is "thirty million, three hundred eighty-eight thousand, twenty".