30723930 has 96 divisors (see below), whose sum is σ = 86733504. Its totient is φ = 7515648.

The previous prime is 30723919. The next prime is 30723937. The reversal of 30723930 is 3932703.

It is a junction number, because it is equal to n+sod(n) for n = 30723894 and 30723903.

It is not an unprimeable number, because it can be changed into a prime (30723937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65557 + ... + 66023.

It is an arithmetic number, because the mean of its divisors is an integer number (903474).

Almost surely, 2^30723930 is an apocalyptic number.

30723930 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 30723930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43366752).

30723930 is an abundant number, since it is smaller than the sum of its proper divisors (56009574).

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

30723930 is a wasteful number, since it uses less digits than its factorization.

30723930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 27.

The square root of 30723930 is about 5542.9171020321. The cubic root of 30723930 is about 313.2027661319.

The spelling of 30723930 in words is "thirty million, seven hundred twenty-three thousand, nine hundred thirty".