30423856 has 20 divisors (see below), whose sum is σ = 59556952. Its totient is φ = 15054336.

The previous prime is 30423853. The next prime is 30423857. The reversal of 30423856 is 65832403.

It is a super-2 number, since 2×30423856² = 1851222027817472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30423851) 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 3 ways as a sum of consecutive naturals, for example, 8250 + ... + 11353.

Almost surely, 2^30423856 is an apocalyptic number.

It is an amenable number.

30423856 is a deficient number, since it is larger than the sum of its proper divisors (29133096).

30423856 is a wasteful number, since it uses less digits than its factorization.

30423856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19708 (or 19702 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 30423856 is about 5515.7824467613. The cubic root of 30423856 is about 312.1797671016.

The spelling of 30423856 in words is "thirty million, four hundred twenty-three thousand, eight hundred fifty-six".