30423820 has 24 divisors (see below), whose sum is σ = 73017504. Its totient is φ = 10430976.

The previous prime is 30423793. The next prime is 30423823. The reversal of 30423820 is 2832403.

It is a junction number, because it is equal to n+sod(n) for n = 30423791 and 30423800.

It is not an unprimeable number, because it can be changed into a prime (30423823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108517 + ... + 108796.

It is an arithmetic number, because the mean of its divisors is an integer number (3042396).

Almost surely, 2^30423820 is an apocalyptic number.

It is an amenable number.

30423820 is an abundant number, since it is smaller than the sum of its proper divisors (42593684).

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

30423820 is a wasteful number, since it uses less digits than its factorization.

30423820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217329 (or 217327 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 30423820 is about 5515.7791833974. The cubic root of 30423820 is about 312.1796439693.

The spelling of 30423820 in words is "thirty million, four hundred twenty-three thousand, eight hundred twenty".