30738820 has 48 divisors (see below), whose sum is σ = 74632320. Its totient is φ = 10416384.

The previous prime is 30738817. The next prime is 30738857. The reversal of 30738820 is 2883703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11227 + ... + 13693.

It is an arithmetic number, because the mean of its divisors is an integer number (1554840).

Almost surely, 2^30738820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30738820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37316160).

30738820 is an abundant number, since it is smaller than the sum of its proper divisors (43893500).

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

30738820 is a wasteful number, since it uses less digits than its factorization.

30738820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 2570 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 30738820 is about 5544.2600949090. The cubic root of 30738820 is about 313.2533546688.

The spelling of 30738820 in words is "thirty million, seven hundred thirty-eight thousand, eight hundred twenty".